{"id":120790,"date":"2024-03-23T23:59:07","date_gmt":"2024-03-23T14:59:07","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/sql-check%e5%88%b6%e7%b4%84%e5%bc%8f%e3%81%ae%e8%a1%a8%e7%8f%be%e3%82%92%e8%a8%98%e8%bf%b0%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f\/"},"modified":"2024-03-27T03:04:46","modified_gmt":"2024-03-26T18:04:46","slug":"sql-check%e5%88%b6%e7%b4%84%e5%bc%8f%e3%81%ae%e8%a1%a8%e7%8f%be%e3%82%92%e8%a8%98%e8%bf%b0%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/sql-check%e5%88%b6%e7%b4%84%e5%bc%8f%e3%81%ae%e8%a1%a8%e7%8f%be%e3%82%92%e8%a8%98%e8%bf%b0%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f\/","title":{"rendered":"SQL CHECK\u5236\u7d04\u5f0f\u306e\u8868\u73fe\u3092\u8a18\u8ff0\u3059\u308b\u65b9\u6cd5\u306f\uff1f"},"content":{"rendered":"

SQL\u306eCHECK\u5236\u7d04\u306f\u3001\u5217\u306e\u5024\u304c\u6307\u5b9a\u3057\u305f\u6761\u4ef6\u3092\u6e80\u305f\u3055\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3053\u3068\u3092\u5f37\u5236\u3057\u307e\u3059\u3002CHECK\u5236\u7d04\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u4f5c\u6210\u6642\u306b\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3082\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u5909\u66f4\u6642\u306b\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002CHECK\u5236\u7d04\u306e\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n

“`
\nALTER TABLE table_name
\nADD CONSTRAINT constraint_name CHECK (condition);
\n“`<\/p>\n

\u3053\u3053\u3067\u3001table_name\u306f\u5236\u7d04\u3092\u8ffd\u52a0\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u306e\u540d\u524d\u3001constraint_name\u306f\u5236\u7d04\u306e\u540d\u524d\uff08\u7701\u7565\u53ef\uff09\u3001condition\u306f\u5217\u306e\u5024\u306e\u7bc4\u56f2\u3092\u5b9a\u7fa9\u3059\u308b\u8ad6\u7406\u5f0f\u3067\u3059\u3002<\/p>\n

\u4ee5\u4e0b\u306b\u3001\u3044\u304f\u3064\u304b\u306eCHECK\u5236\u7d04\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n

1. age\u5217\u306e\u5024\u306e\u7bc4\u56f2\u309218\u6b73\u304b\u308965\u6b73\u307e\u3067\u306b\u5236\u9650\u3059\u308b\u3002<\/p>\n

“`
\nALTER TABLE employees
\nADD CONSTRAINT check_age CHECK (age >= 18 AND age <= 65); “` 2. gender\u5217\u306e\u5024\u3092’M’\u307e\u305f\u306f’F’\u306b\u306e\u307f\u5236\u9650\u3059\u308b\u3002 “` ALTER TABLE employees ADD CONSTRAINT check_gender CHECK (gender IN (‘M’, ‘F’)); “` 3. salary\u5217\u306e\u5024\u304c\u8ca0\u6570\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u5236\u9650\u3059\u308b\u3002 “` ALTER TABLE employees ADD CONSTRAINT check_salary CHECK (salary >= 0);
\n“`<\/p>\n

4. birth_date\u5217\u306e\u5024\u304c’1980-01-01’\u3068’2000-12-31’\u306e\u9593\u306b\u9650\u5b9a\u3059\u308b\u3002<\/p>\n

“`
\nALTER TABLE employees
\nADD CONSTRAINT check_birth_date CHECK (birth_date >= ‘1980-01-01’ AND birth_date <= ‘2000-12-31’);
\n“`<\/p>\n

CHECK\u5236\u7d04\u306f1\u3064\u306e\u5217\u306b\u306e\u307f\u9069\u7528\u3067\u304d\u307e\u3059\u3002\u8907\u6570\u306e\u5217\u306b\u5236\u7d04\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u3001UNIQUE\u5236\u7d04\u307e\u305f\u306fFOREIGN KEY\u5236\u7d04\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

SQL\u306eCHECK\u5236\u7d04\u306f\u3001\u5217\u306e\u5024\u304c\u6307\u5b9a\u3057\u305f\u6761\u4ef6\u3092\u6e80\u305f\u3055\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3053\u3068\u3092\u5f37\u5236\u3057\u307e\u3059\u3002CHECK\u5236\u7d04\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u4f5c\u6210\u6642\u306b\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3082\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u5909\u66f4\u6642\u306b\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002CHECK\u5236\u7d04\u306e\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002 […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-120790","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nSQL CHECK\u5236\u7d04\u5f0f\u306e\u8868\u73fe\u3092\u8a18\u8ff0\u3059\u308b\u65b9\u6cd5\u306f\uff1f - 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