{"id":101462,"date":"2024-03-22T03:59:55","date_gmt":"2024-03-21T18:59:55","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e3%81%a7%e5%88%b6%e7%b4%84%e3%82%92%e8%bf%bd%e5%8a%a0%e3%81%99%e3%82%8b%e3%81%ab%e3%81%af\/"},"modified":"2024-04-05T21:44:03","modified_gmt":"2024-04-05T12:44:03","slug":"mysql%e3%81%a7%e5%88%b6%e7%b4%84%e3%82%92%e8%bf%bd%e5%8a%a0%e3%81%99%e3%82%8b%e3%81%ab%e3%81%af","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e3%81%a7%e5%88%b6%e7%b4%84%e3%82%92%e8%bf%bd%e5%8a%a0%e3%81%99%e3%82%8b%e3%81%ab%e3%81%af\/","title":{"rendered":"mysql\u3067\u5236\u7d04\u3092\u8ffd\u52a0\u3059\u308b\u306b\u306f"},"content":{"rendered":"

MySQL\u3067ALTER TABLE\u3092\u4f7f\u7528\u3057\u3066\u5236\u7d04\u6761\u4ef6\u3092\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002 \u4e00\u822c\u7684\u306a\u5236\u7d04\u6761\u4ef6\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059:<\/p>\n

    \n
  1. \u4e3b\u30ad\u30fc\u3092\u8a2d\u5b9a\uff1a
    \nALTER TABLE \u30c6\u30fc\u30d6\u30eb\u540d ADD PRIMARY KEY (\u30ab\u30e9\u30e0\u540d);<\/li>\n
  2. UNIQUE \u5236\u7d04 (UNIQUE)\uff1a
    \nALTER TABLE \u30c6\u30fc\u30d6\u30eb\u540d ADD UNIQUE (\u30ab\u30e9\u30e0\u540d);<\/li>\n
  3. \u5916\u90e8\u30ad\u30fc\u5236\u7d04 (FOREIGN KEY)\uff1a
    \nALTER TABLE table_name ADD FOREIGN KEY (column_name) REFERENCES referenced_table_name(referenced_column_name);<\/li>\n
  4. NULL \u4e0d\u53ef\u5236\u7d04 (NOT NULL): ALTER TABLE table_name MODIFY column_name data_type NOT NULL;<\/li>\n
  5. DEFAULT \u5236\u7d04\u306e\u5909\u66f4\uff1a
    \nALTER TABLE \u30c6\u30fc\u30d6\u30eb\u540d ALTER COLUMN \u5217\u540d SET DEFAULT \u30c7\u30d5\u30a9\u30eb\u30c8\u5024;<\/li>\n<\/ol>\n

    \u5236\u7d04\u3092\u8ffd\u52a0\u3059\u308b\u3068\u30c7\u30fc\u30bf\u306e\u79fb\u52d5\u3084\u30c6\u30fc\u30d6\u30eb\u69cb\u9020\u306e\u518d\u69cb\u7bc9\u304c\u767a\u751f\u3059\u308b\u5834\u5408\u304c\u3042\u308b\u305f\u3081\u3001\u5fc5\u305a\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u53d6\u3063\u3066\u304b\u3089\u614e\u91cd\u306b\u64cd\u4f5c\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    MySQL\u3067ALTER TABLE\u3092\u4f7f\u7528\u3057\u3066\u5236\u7d04\u6761\u4ef6\u3092\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002 \u4e00\u822c\u7684\u306a\u5236\u7d04\u6761\u4ef6\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059: \u4e3b\u30ad\u30fc\u3092\u8a2d\u5b9a\uff1a ALTER TABLE \u30c6\u30fc\u30d6\u30eb\u540d ADD PRIMARY KEY (\u30ab\u30e9\u30e0\u540d); UNIQU […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-101462","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nmysql\u3067\u5236\u7d04\u3092\u8ffd\u52a0\u3059\u308b\u306b\u306f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/mysql\u3067\u5236\u7d04\u3092\u8ffd\u52a0\u3059\u308b\u306b\u306f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"mysql\u3067\u5236\u7d04\u3092\u8ffd\u52a0\u3059\u308b\u306b\u306f\" \/>\n<meta property=\"og:description\" content=\"MySQL\u3067ALTER TABLE\u3092\u4f7f\u7528\u3057\u3066\u5236\u7d04\u6761\u4ef6\u3092\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002 \u4e00\u822c\u7684\u306a\u5236\u7d04\u6761\u4ef6\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059: \u4e3b\u30ad\u30fc\u3092\u8a2d\u5b9a\uff1a ALTER TABLE \u30c6\u30fc\u30d6\u30eb\u540d ADD PRIMARY KEY (\u30ab\u30e9\u30e0\u540d); 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