{"id":5603,"date":"2025-08-10T01:03:22","date_gmt":"2025-08-09T16:03:22","guid":{"rendered":"https:\/\/sky-peace.net\/?p=5603"},"modified":"2025-08-10T01:03:22","modified_gmt":"2025-08-09T16:03:22","slug":"where-alt","status":"publish","type":"post","link":"https:\/\/sky-peace.net\/certified\/where-alt\/","title":{"rendered":"SQL\u306eWHERE\u53e5\u30de\u30b9\u30bf\u30fc\u8b1b\u5ea7\u2502IN\u3068EXISTS\u306e\u9055\u3044\u304b\u3089NULL\u30fbLIKE\u30fbALL\u307e\u3067\u7db2\u7f85\u3010\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a66\u9a13\u5bfe\u7b56\u3011"},"content":{"rendered":"

\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u3084\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u3067\u3001\u5fc5\u305a\u3068\u8a00\u3063\u3066\u3044\u3044\u307b\u3069\u767b\u5834\u3059\u308b\u306e\u304cSQL\u306eWHERE<\/code>\u53e5\u3067\u3059\u3002\u5358\u7d14\u306a\u6761\u4ef6\u6307\u5b9a\u3060\u3051\u3067\u306a\u304f\u3001NULL<\/code>\u306e\u6271\u3044\u3084\u30b5\u30d6\u30af\u30a8\u30ea\uff08\u526f\u554f\u3044\u5408\u308f\u305b\uff09\u3068\u9023\u643a\u3057\u305f\u8907\u96d1\u306a\u691c\u7d22\u6761\u4ef6\u3092\u6b63\u3057\u304f\u8aad\u307f\u89e3\u304d\u3001\u3042\u308b\u3044\u306f\u4f5c\u6210\u3059\u308b\u80fd\u529b\u304c\u554f\u308f\u308c\u307e\u3059\u3002\u7279\u306b\u3001LIKE<\/code>\u306b\u3088\u308b\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3001IN<\/code>\u3084EXISTS<\/code>\u306b\u3088\u308b\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3001\u305d\u3057\u3066SOME<\/code>\u3084ALL<\/code>\u3092\u4f7f\u3063\u305f\u6570\u91cf\u6bd4\u8f03\u306f\u3001\u3064\u307e\u305a\u304d\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u306e\u4ee3\u8868\u683c\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u3053\u308c\u3089\u306eWHERE<\/code>\u53e5\u3067\u4f7f\u308f\u308c\u308b\u4e3b\u8981\u306a\u691c\u7d22\u6761\u4ef6\u306b\u3064\u3044\u3066\u3001\u305d\u308c\u305e\u308c\u306e\u5f79\u5272\u3068\u6b63\u3057\u3044\u4f7f\u3044\u65b9\u3092\u7db2\u7f85\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u5177\u4f53\u7684\u306aSQL\u4f8b\u3068\u5b9f\u884c\u7d50\u679c\u3001\u305d\u3057\u3066\u5404\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u5206\u3051\u306e\u52d8\u6240\u3092\u5b66\u3073\u3001\u5f97\u70b9\u529b\u30a2\u30c3\u30d7\u306b\u7e4b\u3052\u307e\u3057\u3087\u3046\u3002<\/p>\n

\n

NULL<\/code>\u5024\u306e\u5224\u5b9a | =<\/code>\u3067\u306f\u306a\u304fIS NULL<\/code>\u3092\u4f7f\u3046\u7406\u7531<\/h2>\n

WHERE<\/code>\u53e5\u3092\u5b66\u3076\u4e0a\u3067\u3001\u6700\u521d\u306e\u95a2\u9580\u3068\u306a\u308b\u306e\u304cNULL<\/code>\u306e\u6271\u3044\u3067\u3059\u3002NULL<\/code>\u306f\u300c\u5024\u304c\u5b58\u5728\u3057\u306a\u3044\u300d\u3053\u3068\u3092\u793a\u3059\u7279\u6b8a\u306a\u72b6\u614b\u3067\u3042\u308a\u30010<\/code>\u3084\u7a7a\u6587\u5b57\u5217\uff08''<\/code>\uff09\u3068\u306f\u5168\u304f\u7570\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30ab\u30e9\u30e0\u540d = NULL<\/code>\u306e\u3088\u3046\u306a\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u7528\u3044\u305f\u5224\u5b9a\u306f\u610f\u56f3\u3057\u305f\u7d50\u679c\u3092\u8fd4\u3057\u307e\u305b\u3093\u3002NULL<\/code>\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\u3059\u308b\u306b\u306f\u3001\u5c02\u9580\u306e\u8ff0\u8a9e\u3067\u3042\u308b IS NULL<\/code><\/strong> \u307e\u305f\u306f IS NOT NULL<\/code><\/strong> \u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u306a\u305c=<\/code>\u3067\u306f\u30c0\u30e1\u306a\u306e\u304b\uff1f<\/h3>\n

SQL\u306e\u4e16\u754c\u3067\u306f\u3001NULL<\/code>\u3068\u4ed6\u306e\u5024\uff08NULL<\/code>\u81ea\u8eab\u3092\u542b\u3080\uff09\u3092\u6bd4\u8f03\u3057\u305f\u7d50\u679c\u306f\u3001TRUE<\/code>\u3067\u3082FALSE<\/code>\u3067\u3082\u306a\u304f\u3001\u300c\u4e0d\u660e\uff08UNKNOWN<\/code>\uff09<\/strong>\u300d\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u3002WHERE<\/code>\u53e5\u306f\u6761\u4ef6\u304cTRUE<\/code>\u306b\u306a\u308b\u884c\u3060\u3051\u3092\u62bd\u51fa\u3059\u308b\u305f\u3081\u3001\u8a55\u4fa1\u7d50\u679c\u304cUNKNOWN<\/code>\u306b\u306a\u308b\u884c\u306f\u7d50\u679c\u30bb\u30c3\u30c8\u306b\u542b\u307e\u308c\u307e\u305b\u3093\u3002<\/p>\n

\u4f8b\u3048\u3070\u3001\u300cbonus<\/code>\uff08\u30dc\u30fc\u30ca\u30b9\u984d\uff09\u304c\u767b\u9332\u3055\u308c\u3066\u3044\u306a\u3044\u793e\u54e1\u300d\u3092\u62bd\u51fa\u3057\u305f\u3044\u3068\u8003\u3048\u307e\u3059\u3002<\/p>\n

\u3010\u30c6\u30fc\u30d6\u30eb\u4f8b\uff1aemployees\u3011<\/strong><\/p>\n\n\n\n\n\n\n\n
id<\/th>\nname<\/th>\nbonus<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\n\u4f50\u85e4<\/td>\n100000<\/td>\n<\/tr>\n
2<\/td>\n\u9234\u6728<\/td>\nNULL<\/td>\n<\/tr>\n
3<\/td>\n\u9ad8\u6a4b<\/td>\n0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u3057\u3066\u3001\u9593\u9055\u3063\u305fSQL\u3068\u6b63\u3057\u3044SQL\u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u3010\u9593\u9055\u3044SQL\u3011bonus = NULL<\/code><\/strong><\/p>\n

\nSELECT * FROM employees WHERE bonus = NULL;\n<\/code><\/pre>\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n
(0\u4ef6)<\/p>\n
bonus<\/code>\u304cNULL<\/code>\u3067\u3042\u308b\u9234\u6728\u3055\u3093\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u62bd\u51fa\u3055\u308c\u307e\u305b\u3093\u3002NULL = NULL<\/code>\u306e\u8a55\u4fa1\u304cUNKNOWN<\/code>\u306b\u306a\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n
\u3010\u6b63\u3057\u3044SQL\u3011IS NULL<\/code><\/strong><\/p>\n
\nSELECT * FROM employees WHERE bonus IS NULL;\n<\/code><\/pre>\n
\u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n\n\n
id<\/th>\nname<\/th>\nbonus<\/th>\n<\/tr>\n<\/thead>\n
2<\/td>\n\u9234\u6728<\/td>\nNULL<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u3053\u306e\u3088\u3046\u306b\u3001IS NULL<\/code>\u3092\u4f7f\u3046\u3053\u3068\u3067NULL<\/code>\u5024\u3092\u6301\u3064\u884c\u3092\u6b63\u3057\u304f\u62bd\u51fa\u3067\u304d\u307e\u3059\u3002\u9006\u306b\u3001NULL<\/code>\u3067\u306a\u3044\u884c\u3092\u62bd\u51fa\u3059\u308b\u5834\u5408\u306fIS NOT NULL<\/code>\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u306a\u3069\u3067\u306f\u3001\u3053\u306eNULL<\/code>\u306e\u7279\u6027\u3092\u7a81\u3044\u305f\u554f\u984c\u304c\u983b\u51fa\u3059\u308b\u305f\u3081\u3001\u300c= NULL<\/code>\u306f\u4f7f\u308f\u306a\u3044\u300d\u3068\u6a5f\u68b0\u7684\u306b\u899a\u3048\u3066\u3057\u307e\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n
\n
LIKE<\/code>\u6f14\u7b97\u5b50\u306b\u3088\u308b\u3042\u3044\u307e\u3044\u691c\u7d22\u2502 %<\/code>\u3068_<\/code>\u306e\u4f7f\u3044\u5206\u3051<\/h2>\n
WHERE<\/code>\u53e5\u3067\u6587\u5b57\u5217\u306e\u4e00\u90e8\u304c\u4e00\u81f4\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u3092\u691c\u7d22\u3057\u305f\u3044\u5834\u5408\u3001LIKE<\/code>\u6f14\u7b97\u5b50<\/strong>\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u5b8c\u5168\u4e00\u81f4\u3092\u8abf\u3079\u308b=<\/code>\u3068\u306f\u7570\u306a\u308a\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3068\u547c\u3070\u308c\u308b\u7279\u6b8a\u306a\u8a18\u53f7\u3092\u4f7f\u3063\u3066\u300c\u3042\u3044\u307e\u3044\u691c\u7d22\uff08\u90e8\u5206\u4e00\u81f4\u691c\u7d22\uff09\u300d\u3092\u5b9f\u73fe\u3067\u304d\u308b\u306e\u304c\u7279\u5fb4\u3067\u3059\u3002LIKE<\/code>\u6f14\u7b97\u5b50\u3067\u4f7f\u308f\u308c\u308b\u4e3b\u306a\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u306f%<\/code><\/strong>\u3068_<\/code><\/strong>\u306e2\u3064\u3067\u3059\u3002<\/p>\n
    \n
  • %<\/code>\uff08\u30d1\u30fc\u30bb\u30f3\u30c8\uff09<\/strong>: 0\u6587\u5b57\u4ee5\u4e0a<\/strong>\u306e\u4efb\u610f\u306e\u6587\u5b57\u5217\u3092\u8868\u3057\u307e\u3059\u3002<\/li>\n
  • _<\/code>\uff08\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\uff09<\/strong>: \u4efb\u610f\u306e\u4e00\u6587\u5b57<\/strong>\u3092\u8868\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n
    \u3053\u308c\u3089\u306e\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u69d8\u3005\u306a\u30d1\u30bf\u30fc\u30f3\u306e\u6587\u5b57\u5217\u691c\u7d22\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
    \u3010\u30c6\u30fc\u30d6\u30eb\u4f8b\uff1aproducts\u3011<\/strong><\/p>\n\n\n\n\n\n\n\n\n
    product_id<\/th>\nproduct_name<\/th>\n<\/tr>\n<\/thead>\n
    A-001<\/td>\n\u5fdc\u63f4\u30bf\u30aa\u30eb<\/td>\n<\/tr>\n
    A-002<\/td>\n\u5fa9\u523b\u7248\u30bf\u30aa\u30eb<\/td>\n<\/tr>\n
    B-001<\/td>\n\u30b9\u30dd\u30fc\u30c4\u30c9\u30ea\u30f3\u30af<\/td>\n<\/tr>\n
    B-002<\/td>\n\u30b9\u30dd\u30fc\u30c4\u30a6\u30a7\u30a2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u5177\u4f53\u7684\u306a\u4f7f\u7528\u4f8b<\/h3>\n
    1. \u524d\u65b9\u4e00\u81f4\uff1a\u300c\u5fdc\u63f4\u300d\u304b\u3089\u59cb\u307e\u308b\u5546\u54c1<\/h4>\n
    \nSELECT * FROM products WHERE product_name LIKE '\u5fdc\u63f4%';\n<\/code><\/pre>\n
    \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n\n\n
    product_id<\/th>\nproduct_name<\/th>\n<\/tr>\n<\/thead>\n
    A-001<\/td>\n\u5fdc\u63f4\u30bf\u30aa\u30eb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    2. \u5f8c\u65b9\u4e00\u81f4\uff1a\u300c\u30bf\u30aa\u30eb\u300d\u3067\u7d42\u308f\u308b\u5546\u54c1<\/h4>\n
    \nSELECT * FROM products WHERE product_name LIKE '%\u30bf\u30aa\u30eb';\n<\/code><\/pre>\n
    \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n\n\n\n
    product_id<\/th>\nproduct_name<\/th>\n<\/tr>\n<\/thead>\n
    A-001<\/td>\n\u5fdc\u63f4\u30bf\u30aa\u30eb<\/td>\n<\/tr>\n
    A-002<\/td>\n\u5fa9\u523b\u7248\u30bf\u30aa\u30eb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    3. \u4e2d\u9593\u4e00\u81f4\uff1a\u300c\u30b9\u30dd\u30fc\u30c4\u300d\u3092\u542b\u3080\u5546\u54c1<\/h4>\n
    \nSELECT * FROM products WHERE product_name LIKE '%\u30b9\u30dd\u30fc\u30c4%';\n<\/code><\/pre>\n
    \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n\n\n\n
    product_id<\/th>\nproduct_name<\/th>\n<\/tr>\n<\/thead>\n
    B-001<\/td>\n\u30b9\u30dd\u30fc\u30c4\u30c9\u30ea\u30f3\u30af<\/td>\n<\/tr>\n
    B-002<\/td>\n\u30b9\u30dd\u30fc\u30c4\u30a6\u30a7\u30a2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    4. _<\/code>\u3092\u4f7f\u3063\u305f\u6587\u5b57\u6570\u6307\u5b9a<\/h4>\n
    LIKE '\u30b9\u30dd\u30fc\u30c4__'<\/code> \u306f\u300c\u30b9\u30dd\u30fc\u30c4\u300d+ 2\u6587\u5b57\u306e\u8a087\u6587\u5b57\u306e\u6587\u5b57\u5217\u306b\u30de\u30c3\u30c1\u3057\u307e\u3059\u3002<\/p>\n
    \nSELECT * FROM products WHERE product_name LIKE '\u30b9\u30dd\u30fc\u30c4__';\n<\/code><\/pre>\n
    \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n
    (0\u4ef6)
    — \u300c\u30b9\u30dd\u30fc\u30c4\u30c9\u30ea\u30f3\u30af\u300d\u300c\u30b9\u30dd\u30fc\u30c4\u30a6\u30a7\u30a2\u300d\u306f\u6587\u5b57\u6570\u304c\u5408\u308f\u306a\u3044\u305f\u3081\u30d2\u30c3\u30c8\u3057\u307e\u305b\u3093\u3002\u3082\u3057 product_name<\/code> \u306b\u300c\u30b9\u30dd\u30fc\u30c4\u8336\u300d\u3068\u3044\u3046\u30c7\u30fc\u30bf\u304c\u3042\u308c\u3070\u3001LIKE '\u30b9\u30dd\u30fc\u30c4_'<\/code> \u3067\u30d2\u30c3\u30c8\u3057\u307e\u3059\u3002<\/em><\/p>\n
    %<\/code>\u3084_<\/code>\u81ea\u4f53\u3092\u691c\u7d22\u3057\u305f\u3044\u5834\u5408<\/h3>\n
    %<\/code>\u3084_<\/code>\u3068\u3044\u3046\u6587\u5b57\u305d\u306e\u3082\u306e\u3092\u691c\u7d22\u3057\u305f\u3044\u5834\u5408\u306f\u3001ESCAPE<\/code>\u53e5\u3092\u4f7f\u3063\u3066\u30a8\u30b9\u30b1\u30fc\u30d7\u6587\u5b57\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\\<\/code>\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u6587\u5b57\u306b\u6307\u5b9a\u3059\u308b\u3068\u3001\\%<\/code>\u3067%<\/code>\u3068\u3044\u3046\u6587\u5b57\u3001\\_<\/code>\u3067_<\/code>\u3068\u3044\u3046\u6587\u5b57\u3092\u691c\u7d22\u3067\u304d\u307e\u3059\u3002<\/p>\n
    \n-- '\u5272\u5f15\u7387:10%'\u3068\u3044\u3046\u6587\u5b57\u5217\u3092\u691c\u7d22\u3059\u308b\u4f8b\nSELECT * FROM campaigns WHERE campaign_name LIKE '%10\\%%' ESCAPE '\\';\n<\/code><\/pre>\n
    BETWEEN<\/code>\u3068IN<\/code>\u306b\u3088\u308b\u7bc4\u56f2\u691c\u67fb\u2502\u5348\u5f8c\u8a66\u9a13\u3067\u306e\u983b\u51fa\u30d1\u30bf\u30fc\u30f3<\/h2>\n
    \u6570\u5024\u3084\u65e5\u4ed8\u3001\u3042\u308b\u3044\u306f\u8907\u6570\u306e\u5024\u3092\u5bfe\u8c61\u3068\u3057\u305f\u7bc4\u56f2\u3092\u6307\u5b9a\u3059\u308b\u969b\u306b\u306f\u3001BETWEEN<\/code>\u6f14\u7b97\u5b50<\/strong>\u3068IN<\/code>\u6f14\u7b97\u5b50<\/strong>\u304c\u975e\u5e38\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u3053\u308c\u3089\u306f>=<\/code>\u3084<=<\/code>\u3001OR<\/code>\u3092\u8907\u6570\u7d44\u307f\u5408\u308f\u305b\u308b\u3088\u308a\u3082\u3001SQL\u3092\u7c21\u6f54\u304b\u3064\u76f4\u611f\u7684\u306b\u8a18\u8ff0\u3067\u304d\u308b\u305f\u3081\u3001\u5348\u5f8c\u8a66\u9a13\u306e\u9577\u6587SQL\u3092\u8aad\u89e3\u3059\u308b\u4e0a\u3067\u5fc5\u9808\u306e\u77e5\u8b58\u3067\u3059\u3002<\/p>\n
    BETWEEN<\/code>\uff1a\u9023\u7d9a\u7684\u306a\u7bc4\u56f2\u306e\u6307\u5b9a<\/h3>\n
    BETWEEN<\/code>\u306f\u3001\u6307\u5b9a\u3057\u305f2\u3064\u306e\u5024\u306e\u9593\uff08\u4e21\u7aef\u306e\u5024\u3092\u542b\u3080\uff09<\/strong>\u306b\u3042\u308b\u30c7\u30fc\u30bf\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002\u6570\u5024\u3084\u65e5\u4ed8\u306a\u3069\u306e\u9023\u7d9a\u3057\u305f\u30c7\u30fc\u30bf\u306e\u7bc4\u56f2\u6307\u5b9a\u306b\u7528\u3044\u3089\u308c\u307e\u3059\u3002<\/p>\n
    \u30ab\u30e9\u30e0\u540d BETWEEN \u50241 AND \u50242<\/code> \u306f \u30ab\u30e9\u30e0\u540d >= \u50241 AND \u30ab\u30e9\u30e0\u540d <= \u50242<\/code> \u3068\u7b49\u4fa1\u3067\u3059\u3002<\/p>\n
    \u3010\u30c6\u30fc\u30d6\u30eb\u4f8b\uff1atest_scores\u3011<\/strong><\/p>\n\n\n\n\n\n\n\n\n
    student_id<\/th>\nscore<\/th>\n<\/tr>\n<\/thead>\n
    S001<\/td>\n85<\/td>\n<\/tr>\n
    S002<\/td>\n60<\/td>\n<\/tr>\n
    S003<\/td>\n92<\/td>\n<\/tr>\n
    S004<\/td>\n75<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u4f7f\u7528\u4f8b\uff1a\u70b9\u6570\u304c75\u70b9\u304b\u308990\u70b9\u306e\u9593\u306e\u751f\u5f92\u3092\u62bd\u51fa<\/strong><\/p>\n
    \nSELECT * FROM test_scores WHERE score BETWEEN 75 AND 90;\n<\/code><\/pre>\n
    \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n\n\n\n
    student_id<\/th>\nscore<\/th>\n<\/tr>\n<\/thead>\n
    S001<\/td>\n85<\/td>\n<\/tr>\n
    S004<\/td>\n75<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    BETWEEN<\/code>\u306f\u5883\u754c\u5024\u3092\u542b\u3080<\/strong>\uff08\u4ee5\u4e0a\u30fb\u4ee5\u4e0b\uff09\u3068\u3044\u3046\u70b9\u3092\u3057\u3063\u304b\u308a\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
    IN<\/code>\uff1a\u96e2\u6563\u7684\u306a\u5024\u306e\u30ea\u30b9\u30c8\u6307\u5b9a<\/h3>\n
    IN<\/code>\u306f\u3001\u62ec\u5f27 ()<\/code> \u3067\u56f2\u307e\u308c\u305f\u30ea\u30b9\u30c8\u306e\u4e2d\u306b\u542b\u307e\u308c\u308b\u5024\u3068\u4e00\u81f4\u3059\u308b\u30c7\u30fc\u30bf\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002OR<\/code>\u3092\u4f55\u5ea6\u3082\u66f8\u304f\u5fc5\u8981\u304c\u306a\u304f\u306a\u308a\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n
    \u30ab\u30e9\u30e0\u540d IN (\u50241, \u50242, ...)<\/code> \u306f \u30ab\u30e9\u30e0\u540d = \u50241 OR \u30ab\u30e9\u30e0\u540d = \u50242 OR ...<\/code> \u3068\u7b49\u4fa1\u3067\u3059\u3002<\/p>\n
    \u3010\u30c6\u30fc\u30d6\u30eb\u4f8b\uff1aemployees\u3011<\/strong><\/p>\n\n\n\n\n\n\n\n\n
    id<\/th>\nname<\/th>\ndepartment_id<\/th>\n<\/tr>\n<\/thead>\n
    1<\/td>\n\u4f50\u85e4<\/td>\nD01<\/td>\n<\/tr>\n
    2<\/td>\n\u9234\u6728<\/td>\nD03<\/td>\n<\/tr>\n
    3<\/td>\n\u9ad8\u6a4b<\/td>\nD02<\/td>\n<\/tr>\n
    4<\/td>\n\u7530\u4e2d<\/td>\nD01<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u4f7f\u7528\u4f8b\uff1a\u90e8\u7f72ID\u304cD01<\/code>\uff08\u4eba\u4e8b\uff09\u307e\u305f\u306fD03<\/code>\uff08\u55b6\u696d\uff09\u306e\u793e\u54e1\u3092\u62bd\u51fa<\/strong><\/p>\n
    \nSELECT * FROM employees WHERE department_id IN ('D01', 'D03');\n<\/code><\/pre>\n
    \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n\n\n\n\n
    id<\/th>\nname<\/th>\ndepartment_id<\/th>\n<\/tr>\n<\/thead>\n
    1<\/td>\n\u4f50\u85e4<\/td>\nD01<\/td>\n<\/tr>\n
    2<\/td>\n\u9234\u6728<\/td>\nD03<\/td>\n<\/tr>\n
    4<\/td>\n\u7530\u4e2d<\/td>\nD01<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    IN<\/code>\u306e\u30ea\u30b9\u30c8\u306b\u306f\u3001\u76f4\u63a5\u5024\u3092\u8a18\u8ff0\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u30b5\u30d6\u30af\u30a8\u30ea\uff08\u526f\u554f\u3044\u5408\u308f\u305b\uff09<\/strong>\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002\u3053\u308c\u306f\u975e\u5e38\u306b\u5f37\u529b\u3067\u3001\u5fdc\u7528\u60c5\u5831\u3084DB\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u3067\u306f\u983b\u51fa\u306e\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/p>\n
    \u30b5\u30d6\u30af\u30a8\u30ea\u4f7f\u7528\u4f8b\uff1a\u6771\u4eac\u652f\u793e\u306b\u6240\u5c5e\u3059\u308b\u793e\u54e1\u3092\u62bd\u51fa<\/strong><\/p>\n
    departments<\/code>\u30c6\u30fc\u30d6\u30eb\u304b\u3089location<\/code>\u304c’\u6771\u4eac’\u3067\u3042\u308b\u90e8\u7f72ID\u306e\u30ea\u30b9\u30c8\u3092\u53d6\u5f97\u3057\u3001\u305d\u306e\u30ea\u30b9\u30c8\u306b\u6240\u5c5e\u3059\u308b\u793e\u54e1\u3092employees<\/code>\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u691c\u7d22\u3057\u307e\u3059\u3002<\/p>\n
    \nSELECT * FROM employees\nWHERE department_id IN (SELECT department_id FROM departments WHERE location = '\u6771\u4eac');\n<\/code><\/pre>\n
    \n
    JOIN\u306e\u7d50\u5408\u6761\u4ef6\u3092WHERE\u53e5\u306b\u66f8\u304f\u969b\u306e\u6ce8\u610f\u70b9\u2502\u5185\u90e8\u7d50\u5408\u3068\u5916\u90e8\u7d50\u5408<\/h2>\n
    JOIN<\/code>\u306f\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u7279\u5b9a\u306e\u30ab\u30e9\u30e0\uff08\u30ad\u30fc\uff09\u3092\u4f7f\u3063\u3066\u7d50\u5408\u3059\u308b\u305f\u3081\u306e\u53e5\u3067\u3059\u3002\u6700\u8fd1\u306eSQL\u3067\u306f\u3001\u7d50\u5408\u6761\u4ef6\u3092FROM<\/code>\u53e5\u5185\u306eON<\/code>\u3067\u6307\u5b9a\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u304c\u3001\u53e4\u3044\u8a18\u8ff0\u6cd5\u3084\u4e00\u90e8\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306fWHERE<\/code>\u53e5\u306b\u7d50\u5408\u6761\u4ef6\u3092\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u9055\u3044\u3068\u3001\u7279\u306b\u5916\u90e8\u7d50\u5408\uff08OUTER JOIN\uff09\u3067\u306e\u6ce8\u610f\u70b9\u3092\u7406\u89e3\u3057\u3066\u304a\u304f\u3053\u3068\u306f\u3001\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u306eSQL\u8aad\u89e3\u306a\u3069\u3067\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n
    ANSI SQL-92\u5f62\u5f0f\uff08ON<\/code>\u53e5\u3092\u4f7f\u7528\uff09 vs SQL-89\u5f62\u5f0f\uff08WHERE<\/code>\u53e5\u3092\u4f7f\u7528\uff09<\/h3>\n
    employees<\/code>\uff08\u793e\u54e1\uff09\u30c6\u30fc\u30d6\u30eb\u3068departments<\/code>\uff08\u90e8\u7f72\uff09\u30c6\u30fc\u30d6\u30eb\u3092department_id<\/code>\u3067\u7d50\u5408\u3059\u308b\u5834\u5408\u3092\u8003\u3048\u307e\u3059\u3002<\/p>\n
    \u3010\u63a8\u5968\u3055\u308c\u308bSQL-92\u5f62\u5f0f\u3011<\/strong><\/p>\n
    \nSELECT e.name, d.department_name\nFROM employees e\nJOIN departments d ON e.department_id = d.department_id;\n<\/code><\/pre>\n
    \u3053\u306e\u5f62\u5f0f\u3067\u306f\u3001JOIN<\/code>\u3067\u7d50\u5408\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u3092\u660e\u793a\u3057\u3001ON<\/code>\u3067\u7d50\u5408\u6761\u4ef6\u3001WHERE<\/code>\u3067\u7d5e\u308a\u8fbc\u307f\u6761\u4ef6\u3068\u3001\u5f79\u5272\u304c\u660e\u78ba\u306b\u5206\u304b\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
    \u3010\u53e4\u3044SQL-89\u5f62\u5f0f\u3011<\/strong><\/p>\n
    \nSELECT e.name, d.department_name\nFROM employees e, departments d\nWHERE e.department_id = d.department_id;\n<\/code><\/pre>\n
    FROM<\/code>\u53e5\u3067\u30c6\u30fc\u30d6\u30eb\u3092\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u5217\u6319\u3057\u3001WHERE<\/code>\u53e5\u306b\u7d50\u5408\u6761\u4ef6\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002\u4e21\u8005\u306b\u7d10\u3065\u304f\u30ec\u30b3\u30fc\u30c9\u306e\u307f\u304c\u62bd\u51fa\u3055\u308c\u308b\u305f\u3081\u3001\u7d50\u679c\u3068\u3057\u3066\u5185\u90e8\u7d50\u5408\uff08INNER JOIN\uff09<\/strong>\u3068\u540c\u3058\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
    WHERE<\/code>\u53e5\u3067\u306e\u5916\u90e8\u7d50\u5408\u3068\u7279\u6709\u306e\u8a18\u53f7 (+)<\/code><\/h3>\n
    \u554f\u984c\u306f\u5916\u90e8\u7d50\u5408\u3067\u3059\u3002LEFT JOIN<\/code>\u3084RIGHT JOIN<\/code>\u3092WHERE<\/code>\u53e5\u3067\u8868\u73fe\u3059\u308b\u5834\u5408\u3001Oracle\u306a\u3069\u4e00\u90e8\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306f(+)<\/code>\u3068\u3044\u3046\u72ec\u81ea\u306e\u6f14\u7b97\u5b50\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n
    LEFT JOIN<\/code>\u306e\u4f8b\uff1a\u90e8\u7f72\u306b\u6240\u5c5e\u3057\u3066\u3044\u306a\u3044\u793e\u54e1\u3082\u542b\u3081\u3066\u4e00\u89a7\u8868\u793a<\/strong><\/p>\n
    \u3010SQL-92\u5f62\u5f0f\u306eLEFT JOIN`\u3011<\/strong><\/p>\n
    \nSELECT e.name, d.department_name\nFROM employees e\nLEFT JOIN departments d ON e.department_id = d.department_id;\n<\/code><\/pre>\n
    \u793e\u54e1\u30c6\u30fc\u30d6\u30eb\u3092\u4e3b\u8ef8\uff08\u5de6\u5074\uff09\u3068\u3057\u3001\u90e8\u7f72\u540d\u304c\u5b58\u5728\u3057\u306a\u3044\u793e\u54e1\uff08\u4f8b\u3048\u3070department_id<\/code>\u304cNULL<\/code>\u306e\u793e\u54e1\uff09\u3082\u7d50\u679c\u306b\u542b\u3081\u307e\u3059\u3002<\/p>\n
    \u3010Oracle\u306e(+)<\/code>\u3092\u4f7f\u3063\u305fWHERE`\u53e5\u3067\u306e\u8868\u73fe\u3011<\/strong><\/p>\n
    \nSELECT e.name, d.department_name\nFROM employees e, departments d\nWHERE e.department_id = d.department_id (+);\n<\/code><\/pre>\n
    (+)<\/code>\u306f\u3001\u60c5\u5831\u304c\u4e0d\u8db3\u3057\u3066\u3044\u308b\u5074<\/strong>\uff08\u3053\u306e\u5834\u5408\u306fdepartments<\/code>\u30c6\u30fc\u30d6\u30eb\u5074\uff09\u306e\u7d50\u5408\u30ab\u30e9\u30e0\u306b\u4ed8\u3051\u307e\u3059\u3002\u300ce.department_id<\/code>\u306b\u5bfe\u5fdc\u3059\u308bd.department_id<\/code>\u304c\u7121\u304f\u3066\u3082\u3001e<\/code>\u306e\u884c\u306f\u8868\u793a\u3057\u3066\u306d\u300d\u3068\u3044\u3046\u610f\u5473\u5408\u3044\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
    \u3053\u306e(+)<\/code>\u8a18\u53f7\u306f\u3001\u3069\u3061\u3089\u306e\u30c6\u30fc\u30d6\u30eb\u304c\u4e3b\u8ef8\u306a\u306e\u304b\u3092\u77ac\u6642\u306b\u5224\u65ad\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u8aad\u89e3\u304c\u96e3\u3057\u3044\u3067\u3059\u3002\u60c5\u5831\u51e6\u7406\u6280\u8853\u8005\u8a66\u9a13\u3067\u3053\u306e\u5f62\u5f0f\u304c\u51fa\u984c\u3055\u308c\u308b\u3053\u3068\u306f\u7a00\u3067\u3059\u304c\u3001\u5b9f\u52d9\u3067\u906d\u9047\u3059\u308b\u53ef\u80fd\u6027\u306f\u30bc\u30ed\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u539f\u5247\u3068\u3057\u3066ON<\/code>\u53e5\u3092\u4f7f\u3046\u3079\u304d\u3067\u3059\u304c\u3001\u77e5\u8b58\u3068\u3057\u3066\u77e5\u3063\u3066\u304a\u304f\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002\u91cd\u8981\u306a\u306e\u306f\u3001WHERE<\/code>\u53e5\u306b\u66f8\u304b\u308c\u305f=`\u304c\u3001\u4e8b\u5b9f\u4e0a\u306e\u5185\u90e8\u7d50\u5408\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3066\u3044\u308b<\/strong>\u5834\u5408\u304c\u3042\u308b\u3001\u3068\u3044\u3046\u70b9\u3067\u3059\u3002<\/p>\n
    EXISTS<\/code>\u306b\u3088\u308b\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u2502IN\u3068\u306e\u9055\u3044\u3068\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea<\/h2>\n
    EXISTS<\/code>\u306f\u3001\u30b5\u30d6\u30af\u30a8\u30ea\uff08\u526f\u554f\u3044\u5408\u308f\u305b\uff09\u304c1\u4ef6\u3067\u3082\u7d50\u679c\u3092\u8fd4\u305b\u3070TRUE<\/code><\/strong>\u30011\u4ef6\u3082\u8fd4\u3055\u306a\u3051\u308c\u3070FALSE<\/code>\u3092\u8fd4\u3059\u6f14\u7b97\u5b50\u3067\u3059\u3002\u7279\u5b9a\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30c7\u30fc\u30bf\u304c\u300c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u300d\u3060\u3051\u3092\u5224\u5b9a\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002IN<\/code>\u304c\u30b5\u30d6\u30af\u30a8\u30ea\u306e\u7d50\u679c\u30ea\u30b9\u30c8\u3068\u300c\u5024\u300d\u3092\u6bd4\u8f03\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001EXISTS<\/code>\u306f\u7d50\u679c\u306e\u300c\u6709\u7121\u300d\u3060\u3051\u3092\u898b\u308b\u3001\u3068\u3044\u3046\u70b9\u304c\u6839\u672c\u7684\u306a\u9055\u3044\u3067\u3059\u3002<\/p>\n
    EXISTS<\/code>\u306f\u901a\u5e38\u3001\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea<\/strong>\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u308f\u308c\u307e\u3059\u3002\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u3068\u306f\u3001\u5916\u5074\u306e\u30af\u30a8\u30ea\uff08\u4e3b\u30af\u30a8\u30ea\uff09\u306e\u30ab\u30e9\u30e0\u3092\u5185\u5074\u306e\u30af\u30a8\u30ea\uff08\u30b5\u30d6\u30af\u30a8\u30ea\uff09\u306eWHERE<\/code>\u53e5\u3067\u53c2\u7167\u3059\u308b\u3088\u3046\u306a\u3001\u76f8\u4e92\u306b\u95a2\u9023\u3057\u305f\u30b5\u30d6\u30af\u30a8\u30ea\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n
    EXISTS<\/code>\u306e\u52d5\u4f5c\u30a4\u30e1\u30fc\u30b8<\/h3>\n
      \n
    1. \u4e3b\u30af\u30a8\u30ea\u306e\u884c\u304c1\u884c\u305a\u3064\u51e6\u7406\u3055\u308c\u308b\u3002<\/li>\n
    2. \u305d\u306e\u884c\u306e\u5024\u3092\u4f7f\u3044\u3001\u30b5\u30d6\u30af\u30a8\u30ea\u304c\u5b9f\u884c\u3055\u308c\u308b\u3002<\/li>\n
    3. \u30b5\u30d6\u30af\u30a8\u30ea\u304c1\u4ef6\u3067\u3082\u7d50\u679c\u3092\u8fd4\u305b\u3070\u3001\u305d\u306e\u4e3b\u30af\u30a8\u30ea\u306e\u884c\u306fTRUE<\/code>\u3068\u5224\u5b9a\u3055\u308c\u3001\u7d50\u679c\u30bb\u30c3\u30c8\u306b\u542b\u307e\u308c\u308b\u3002<\/li>\n
    4. \u4e3b\u30af\u30a8\u30ea\u306e\u5168\u884c\u306b\u5bfe\u3057\u3066\u30011\u301c3\u3092\u7e70\u308a\u8fd4\u3059\u3002<\/li>\n<\/ol>\n
      \u4f7f\u7528\u4f8b\uff1a\u4e00\u5ea6\u3067\u3082\u5546\u54c1\u3092\u8cfc\u5165\u3057\u305f\u3053\u3068\u304c\u3042\u308b\u9867\u5ba2\u3092\u4e00\u89a7\u8868\u793a\u3059\u308b<\/strong><\/p>\n
      customers<\/code>\uff08\u9867\u5ba2\uff09\u30c6\u30fc\u30d6\u30eb\u3068orders<\/code>\uff08\u6ce8\u6587\uff09\u30c6\u30fc\u30d6\u30eb\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n
      \u3010\u30c6\u30fc\u30d6\u30eb\u4f8b\uff1acustomers\u3011<\/strong><\/p>\n\n\n\n\n\n\n\n
      customer_id<\/th>\nname<\/th>\n<\/tr>\n<\/thead>\n
      C01<\/td>\n\u658e\u85e4<\/td>\n<\/tr>\n
      C02<\/td>\n\u4e2d\u6751<\/td>\n<\/tr>\n
      C03<\/td>\n\u5409\u7530<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \u3010\u30c6\u30fc\u30d6\u30eb\u4f8b\uff1aorders\u3011<\/strong><\/p>\n\n\n\n\n\n\n\n
      order_id<\/th>\ncustomer_id<\/th>\norder_date<\/th>\n<\/tr>\n<\/thead>\n
      1<\/td>\nC01<\/td>\n2025-08-01<\/td>\n<\/tr>\n
      2<\/td>\nC03<\/td>\n2025-08-02<\/td>\n<\/tr>\n
      3<\/td>\nC01<\/td>\n2025-08-05<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \nSELECT c.customer_id, c.name\nFROM customers c\nWHERE EXISTS (\n  SELECT *\n  FROM orders o\n  WHERE o.customer_id = c.customer_id -- \u4e3b\u30af\u30a8\u30ea\u306ec.customer_id\u3092\u53c2\u7167\uff08\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\uff09\n);\n<\/code><\/pre>\n
      \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n\n\n\n
      customer_id<\/th>\nname<\/th>\n<\/tr>\n<\/thead>\n
      C01<\/td>\n\u658e\u85e4<\/td>\n<\/tr>\n
      C03<\/td>\n\u5409\u7530<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \u3053\u306eSQL\u306f\u3001customers<\/code>\u30c6\u30fc\u30d6\u30eb\u306e\u5404\u884c\uff08\u658e\u85e4\u3055\u3093\u3001\u4e2d\u6751\u3055\u3093\u3001\u5409\u7530\u3055\u3093\uff09\u306b\u3064\u3044\u3066\u3001orders<\/code>\u30c6\u30fc\u30d6\u30eb\u5185\u306b\u5bfe\u5fdc\u3059\u308bcustomer_id<\/code>\u3092\u6301\u3064\u6ce8\u6587\u8a18\u9332\u304c\u5b58\u5728\u3059\u308b\u304b\u3092\u8abf\u3079\u3066\u3044\u307e\u3059\u3002\u4e2d\u6751\u3055\u3093\uff08C02\uff09\u306f\u6ce8\u6587\u8a18\u9332\u304c\u306a\u3044\u305f\u3081\u3001\u30b5\u30d6\u30af\u30a8\u30ea\u304c0\u4ef6\u3068\u306a\u308a\u3001EXISTS<\/code>\u304cFALSE<\/code>\u3092\u8fd4\u3059\u306e\u3067\u7d50\u679c\u304b\u3089\u9664\u5916\u3055\u308c\u307e\u3059\u3002<\/p>\n
      IN<\/code> vs EXISTS<\/code> \u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n\n\n\n\n\n
      \u89b3\u70b9<\/th>\nIN<\/code><\/th>\nEXISTS<\/code><\/th>\n<\/tr>\n<\/thead>\n
      \u6bd4\u8f03\u5bfe\u8c61<\/strong><\/td>\n\u5024<\/strong>\u306e\u30ea\u30b9\u30c8<\/td>\n\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u6709\u7121<\/strong><\/td>\n<\/tr>\n
      \u5f97\u610f\u306a\u51e6\u7406<\/strong><\/td>\n\u30b5\u30d6\u30af\u30a8\u30ea\u304c\u8fd4\u3059\u7d50\u679c\u30bb\u30c3\u30c8\u304c\u5c0f\u3055\u3044<\/strong>\u5834\u5408<\/td>\n\u30b5\u30d6\u30af\u30a8\u30ea\u304c\u8fd4\u3059\u7d50\u679c\u30bb\u30c3\u30c8\u304c\u5927\u304d\u3044<\/strong>\u5834\u5408<\/td>\n<\/tr>\n
      \u30b5\u30d6\u30af\u30a8\u30ea<\/strong><\/td>\n\u975e\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u3067\u4f7f\u308f\u308c\u308b\u3053\u3068\u304c\u591a\u3044<\/td>\n\u76f8\u95a2\u30b5\u30d6\u30af\u30a8\u30ea\u3067\u4f7f\u308f\u308c\u308b\u3053\u3068\u304c\u591a\u3044<\/td>\n<\/tr>\n
      NULL\u306e\u6271\u3044<\/strong><\/td>\n\u30b5\u30d6\u30af\u30a8\u30ea\u7d50\u679c\u306bNULL<\/code>\u304c\u542b\u307e\u308c\u308b\u3068\u610f\u56f3\u3057\u306a\u3044\u7d50\u679c\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308b\uff08\u7279\u306bNOT IN<\/code>\uff09<\/td>\nNULL<\/code>\u306e\u5f71\u97ff\u3092\u53d7\u3051\u306b\u304f\u3044<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \u4e00\u822c\u7684\u306b\u3001EXISTS<\/code>\u306e\u65b9\u304c\u9ad8\u901f\u306b\u52d5\u4f5c\u3059\u308b\u30b1\u30fc\u30b9\u304c\u591a\u3044\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002IN<\/code>\u306f\u30b5\u30d6\u30af\u30a8\u30ea\u3092\u4e00\u5ea6\u3060\u3051\u5b9f\u884c\u3057\u3001\u305d\u306e\u7d50\u679c\u30ea\u30b9\u30c8\u3092\u30e1\u30e2\u30ea\u306b\u4fdd\u6301\u3057\u3066\u4e3b\u30af\u30a8\u30ea\u3068\u6bd4\u8f03\u3057\u307e\u3059\u304c\u3001EXISTS<\/code>\u306f\u30b5\u30d6\u30af\u30a8\u30ea\u304c1\u4ef6\u3067\u3082\u898b\u3064\u304b\u3063\u305f\u6642\u70b9\u3067\u8a55\u4fa1\u3092\u6253\u3061\u5207\u308b\u305f\u3081\u3067\u3059\u3002DB\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u3067\u306f\u3001\u3053\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u9055\u3044\u3092\u610f\u8b58\u3057\u305f\u9078\u629e\u304c\u6c42\u3081\u3089\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
      \n
      SOME<\/code>\u3068ALL<\/code>\u306b\u3088\u308b\u6570\u91cf\u6bd4\u8f03\u2502ANY\u3068\u306e\u95a2\u4fc2\u3068NOT\u306e\u6319\u52d5<\/h2>\n
      SOME<\/code>\u3068ALL<\/code>\u306f\u3001IN<\/code>\u3084EXISTS<\/code>\u3068\u540c\u69d8\u306b\u30b5\u30d6\u30af\u30a8\u30ea\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u3046\u6bd4\u8f03\u6f14\u7b97\u5b50\u3067\u3059\u3002\u30b5\u30d6\u30af\u30a8\u30ea\u304c\u8fd4\u3059\u8907\u6570\u306e\u7d50\u679c\u5024\u3068\u3001\u4e3b\u30af\u30a8\u30ea\u306e\u5024\u3092\u6bd4\u8f03\u3057\u307e\u3059\u3002<\/p>\n
        \n
      • SOME<\/code><\/strong>: \u30b5\u30d6\u30af\u30a8\u30ea\u304c\u8fd4\u3059\u7d50\u679c\u306e\u3044\u305a\u308c\u304b1\u3064\u3067\u3082<\/strong>\u6761\u4ef6\u3092\u6e80\u305f\u305b\u3070TRUE<\/code>\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n
      • ALL<\/code><\/strong>: \u30b5\u30d6\u30af\u30a8\u30ea\u304c\u8fd4\u3059\u3059\u3079\u3066\u306e\u7d50\u679c<\/strong>\u306b\u5bfe\u3057\u3066\u6761\u4ef6\u3092\u6e80\u305f\u305b\u3070TRUE<\/code>\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n
        \u306a\u304a\u3001ANY<\/code>\u306fSOME`\u3068\u5168\u304f\u540c\u3058\u610f\u5473<\/strong>\u3092\u6301\u3064\u30b7\u30ce\u30cb\u30e0\uff08\u540c\u7fa9\u8a9e\uff09\u3067\u3059\u3002SQL\u306e\u6a19\u6e96\u898f\u683c\u3067\u306fSOME<\/code>\u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001ANY<\/code>\u3082\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
        \u3010\u30c6\u30fc\u30d6\u30eb\u4f8b\uff1aproducts\u3011<\/strong><\/p>\n\n\n\n\n\n\n\n\n
        name<\/th>\ncategory<\/th>\nprice<\/th>\n<\/tr>\n<\/thead>\n
        A<\/td>\n\u6587\u623f\u5177<\/td>\n100<\/td>\n<\/tr>\n
        B<\/td>\n\u6587\u623f\u5177<\/td>\n150<\/td>\n<\/tr>\n
        C<\/td>\n\u98df\u54c1<\/td>\n200<\/td>\n<\/tr>\n
        D<\/td>\n\u98df\u54c1<\/td>\n300<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        SOME<\/code> (ANY<\/code>) \u306e\u4f7f\u7528\u4f8b<\/h3>\n
        \u300c\u6587\u623f\u5177\u30ab\u30c6\u30b4\u30ea\u306e\u3044\u305a\u308c\u304b\u306e<\/strong>\u5546\u54c1\u3088\u308a\u3082\u4fa1\u683c\u304c\u9ad8\u3044\u5546\u54c1\u300d\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002
        \u30b5\u30d6\u30af\u30a8\u30ea (SELECT price FROM products WHERE category = '\u6587\u623f\u5177')<\/code> \u306f (100, 150)<\/code> \u3068\u3044\u3046\u7d50\u679c\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
        \nSELECT *\nFROM products\nWHERE price > SOME (SELECT price FROM products WHERE category = '\u6587\u623f\u5177');\n-- WHERE price > ANY (...) \u3068\u540c\u3058\n<\/code><\/pre>\n
        \u3053\u306e\u6761\u4ef6\u306f price > 100 OR price > 150<\/code> \u3068\u5c55\u958b\u3055\u308c\u307e\u3059\u3002price > 100<\/code> \u3092\u6e80\u305f\u305b\u3070\u826f\u3044\u305f\u3081\u3001100\u3088\u308a\u5927\u304d\u3044\u3059\u3079\u3066\u306e\u5546\u54c1\u304c\u5bfe\u8c61\u3067\u3059\u3002<\/p>\n
        \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n\n\n\n\n
        name<\/th>\ncategory<\/th>\nprice<\/th>\n<\/tr>\n<\/thead>\n
        B<\/td>\n\u6587\u623f\u5177<\/td>\n150<\/td>\n<\/tr>\n
        C<\/td>\n\u98df\u54c1<\/td>\n200<\/td>\n<\/tr>\n
        D<\/td>\n\u98df\u54c1<\/td>\n300<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        ALL<\/code>\u306e\u4f7f\u7528\u4f8b<\/h3>\n
        \u300c\u6587\u623f\u5177\u30ab\u30c6\u30b4\u30ea\u306e\u3059\u3079\u3066\u306e<\/strong>\u5546\u54c1\u3088\u308a\u3082\u4fa1\u683c\u304c\u9ad8\u3044\u5546\u54c1\u300d\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002<\/p>\n
        \nSELECT *\nFROM products\nWHERE price > ALL (SELECT price FROM products WHERE category = '\u6587\u623f\u5177');\n<\/code><\/pre>\n
        \u3053\u306e\u6761\u4ef6\u306f price > 100 AND price > 150<\/code> \u3068\u5c55\u958b\u3055\u308c\u307e\u3059\u3002\u4e21\u65b9\u3092\u6e80\u305f\u3059\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001price > 150<\/code> \u304c\u6761\u4ef6\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
        \u3010\u5b9f\u884c\u7d50\u679c\u3011<\/strong><\/p>\n\n\n\n\n\n\n
        name<\/th>\ncategory<\/th>\nprice<\/th>\n<\/tr>\n<\/thead>\n
        C<\/td>\n\u98df\u54c1<\/td>\n200<\/td>\n<\/tr>\n
        D<\/td>\n\u98df\u54c1<\/td>\n300<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        IN<\/code>, =<\/code>, <><\/code> \u3068\u306e\u95a2\u4fc2<\/h3>\n
        \u3053\u308c\u3089\u306e\u6f14\u7b97\u5b50\u306f\u3001\u4ed6\u306e\u6f14\u7b97\u5b50\u3068\u5bc6\u63a5\u306a\u95a2\u4fc2\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n
          \n
        • = SOME (\u30ea\u30b9\u30c8)<\/code> \u306f IN (\u30ea\u30b9\u30c8)` \u3068\u5168\u304f\u540c\u3058<\/strong>\u3067\u3059\u3002\u300c\u30ea\u30b9\u30c8\u306e\u3044\u305a\u308c\u304b\u3068\u7b49\u3057\u3044\u300d\u3068\u3044\u3046\u610f\u5473\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n
        • <> ALL (\u30ea\u30b9\u30c8)<\/code> \u306f NOT IN (\u30ea\u30b9\u30c8)` \u3068\u307b\u307c\u540c\u3058<\/strong>\u3067\u3059\u3002\u300c\u30ea\u30b9\u30c8\u306e\u3059\u3079\u3066\u3068\u7b49\u3057\u304f\u306a\u3044\u300d\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002\uff08\u305f\u3060\u3057\u3001NOT IN<\/code>\u306f\u30ea\u30b9\u30c8\u5185\u306bNULL<\/code>\u304c\u3042\u308b\u3068\u7d50\u679c\u304c0\u4ef6\u306b\u306a\u308b\u3068\u3044\u3046\u7f60\u304c\u3042\u308a\u307e\u3059\u304c\u3001<> ALL<\/code>\u306fNULL<\/code>\u3092\u7121\u8996\u3059\u308b\u6319\u52d5\u3092\u793a\u3059DBMS\u3082\u3042\u308a\u3001\u53b3\u5bc6\u306b\u306f\u6319\u52d5\u304c\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\uff09<\/li>\n
        • <> SOME (\u30ea\u30b9\u30c8)<\/code>\u306f\u300c\u30ea\u30b9\u30c8\u306e\u3044\u305a\u308c\u304b\u3068\u7b49\u3057\u304f\u306a\u3044\u300d\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002\u4f8b\u3048\u3070\u30ea\u30b9\u30c8\u304c (100, 150)<\/code> \u306e\u5834\u5408\u3001100\u3067\u306a\u3044\u304b\u3001\u307e\u305f\u306f150\u3067\u306a\u3044\u3001\u3068\u3044\u3046\u6761\u4ef6\u306a\u306e\u3067\u3001\u307b\u3068\u3093\u3069\u306e\u30c7\u30fc\u30bf\u304cTRUE<\/code>\u306b\u306a\u308a\u3001\u5b9f\u7528\u7684\u306a\u4f7f\u3044\u65b9\u306f\u7a00\u3067\u3059\u3002<\/li>\n<\/ul>\n
          \u60c5\u5831\u51e6\u7406\u6280\u8853\u8005\u8a66\u9a13\u3067\u306f\u3001> ALL<\/code>\uff08\u6700\u5927\u5024\u3088\u308a\u5927\u304d\u3044\uff09\u3001< ALL<\/code>\uff08\u6700\u5c0f\u5024\u3088\u308a\u5c0f\u3055\u3044\uff09\u3001> SOME<\/code>\uff08\u6700\u5c0f\u5024\u3088\u308a\u5927\u304d\u3044\uff09\u3001< SOME<\/code>\uff08\u6700\u5927\u5024\u3088\u308a\u5c0f\u3055\u3044\uff09\u3068\u3044\u3063\u305f\u4f7f\u3044\u5206\u3051\u304c\u554f\u308f\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u6f14\u7b97\u5b50\u304c\u3069\u306e\u3088\u3046\u306a\u610f\u5473\u306b\u306a\u308b\u304b\u3001\u5177\u4f53\u4f8b\u3092\u5143\u306b\u6574\u7406\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u3084\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u3067\u3001\u5fc5\u305a\u3068\u8a00\u3063\u3066\u3044\u3044\u307b\u3069\u767b\u5834\u3059\u308b\u306e\u304cSQL\u306eWHERE\u53e5\u3067\u3059\u3002\u5358\u7d14\u306a\u6761\u4ef6\u6307\u5b9a\u3060\u3051\u3067\u306a\u304f\u3001NULL\u306e\u6271\u3044\u3084\u30b5\u30d6\u30af\u30a8\u30ea\uff08\u526f\u554f\u3044\u5408\u308f\u305b\uff09\u3068\u9023\u643a\u3057\u305f … <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","columnck":"","stmeta_robots":"index, follow","st_titlewords":"","st_title_extra":"","st_keywords":"","st_description":"","st_display_ad_mark":"","st_display_ad_mark_hide":"","textcopyck":"","st_copyright":"","st_copyurl":"","eyecatch_set":"","st_youtube_url":"","st_youtube_eyecatch":"","headerwidget_set":"","updatewidget_set":"","kanrenwidget_set":"","ikkatuwidget_set":"","koukoku_set":"","auto_adsense_koukoku_set":"","st_redirect":"","st_redirect_url_as_canonical":"","st_redirect_pvm_do_not_track":"","post_data_updatewidget_set":"","st_post_header_under_bg":"","st_twitter_tag":"","affinger_note":"","rankdisplayck":"","st_head_code":"","st_footer_code":"","st_post_header_under_code":"","_st_toc_override":false,"_st_toc_settings":[]},"categories":[3],"tags":[6],"class_list":["post-5603","post","type-post","status-publish","format-standard","hentry","category-ipa","tag-6"],"_links":{"self":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts\/5603","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/comments?post=5603"}],"version-history":[{"count":0,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts\/5603\/revisions"}],"wp:attachment":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/media?parent=5603"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/categories?post=5603"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/tags?post=5603"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}