{"id":199680,"date":"2025-05-06T08:01:56","date_gmt":"2025-05-06T00:01:56","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199680\/"},"modified":"2025-05-06T08:01:56","modified_gmt":"2025-05-06T00:01:56","slug":"sql%e4%b8%adalter%e8%af%ad%e5%8f%a5%e7%9a%84%e4%bd%9c%e7%94%a8%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199680\/","title":{"rendered":"SQL\u4e2dALTER\u8bed\u53e5\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

SQL\u4e2dALTER\u8bed\u53e5\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f<\/h1>\n

\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n

SQL\u7684ALTER\u8bed\u53e5\u4f5c\u7528\uff0c\u9700\u8981\u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/p>\n

\u5728\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u4e2d\uff0cALTER\u8bed\u53e5\u662f\u4e00\u79cd\u7528\u4e8e\u4fee\u6539\u6570\u636e\u5e93\u5bf9\u8c61\u7684SQL\u547d\u4ee4\u3002\u901a\u8fc7ALTER\u8bed\u53e5\uff0c\u6211\u4eec\u53ef\u4ee5\u5bf9\u8868\u3001\u5217\u3001\u7d22\u5f15\u3001\u89c6\u56fe\u7b49\u6570\u636e\u5e93\u5bf9\u8c61\u8fdb\u884c\u4fee\u6539\uff0c\u5305\u62ec\u6dfb\u52a0\u3001\u5220\u9664\u3001\u4fee\u6539\u7b49\u64cd\u4f5c\u3002\u4e0b\u9762\u5c06\u5177\u4f53\u4ecb\u7ecdALTER\u8bed\u53e5\u7684\u5e38\u89c1\u7528\u6cd5\uff0c\u5e76\u63d0\u4f9b\u76f8\u5173\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    \n
  1. ALTER TABLE\u8bed\u53e5\u7528\u4e8e\u4fee\u6539\u8868\u7684\u7ed3\u6784\u3002\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u3001\u5220\u9664\u3001\u4fee\u6539\u5217\u3001\u7ea6\u675f\u3001\u7d22\u5f15\u7b49\u65b9\u5f0f\u6765\u6539\u53d8\u8868\u7684\u5b9a\u4e49\u3002\u4e0b\u9762\u662f\u4e00\u4e9bALTER TABLE\u7684\u5e38\u89c1\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n

    1.1 \u6dfb\u52a0\u4e00\u4e2a\u65b0\u5217\uff1a<\/p>\n

    ALTER TABLE \u8868\u540d\nADD \u5217\u540d \u6570\u636e\u7c7b\u578b;<\/pre>\n
    1.2 \u4fee\u6539\u5217\u7684\u6570\u636e\u7c7b\u578b\uff1a<\/p>\n
    ALTER TABLE \u8868\u540d\nALTER COLUMN \u5217\u540d NEW_DATATYPE;<\/pre>\n
    1.3 \u5220\u9664\u8868\u4e2d\u7684\u4e00\u4e2a\u5217\uff1a<\/p>\n
    ALTER TABLE \u8868\u540d\nDROP COLUMN \u5217\u540d;<\/pre>\n
      \n
    1. ALTER INDEX\u8bed\u53e5\u7528\u4e8e\u4fee\u6539\u7d22\u5f15\u3002\u53ef\u4ee5\u901a\u8fc7\u91cd\u547d\u540d\u7d22\u5f15\u3001\u4fee\u6539\u7d22\u5f15\u7684\u7b5b\u9009\u6761\u4ef6\u3001\u66f4\u6539\u7d22\u5f15\u7684\u5b58\u50a8\u4f4d\u7f6e\u7b49\u65b9\u5f0f\u6765\u4fee\u6539\u7d22\u5f15\u7684\u5b9a\u4e49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9bALTER INDEX\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n
      2.1 \u91cd\u547d\u540d\u7d22\u5f15\uff1a<\/p>\n
      ALTER INDEX \u65e7\u7d22\u5f15\u540d\nRENAME TO \u65b0\u7d22\u5f15\u540d;<\/pre>\n
      2.2 \u4fee\u6539\u7d22\u5f15\u7684\u7b5b\u9009\u6761\u4ef6\uff1a<\/p>\n
      ALTER INDEX \u7d22\u5f15\u540d\nWHERE \u65b0\u7b5b\u9009\u6761\u4ef6;<\/pre>\n
        \n
      1. ALTER VIEW\u8bed\u53e5\u7528\u4e8e\u4fee\u6539\u89c6\u56fe\u7684\u5b9a\u4e49\u3002\u53ef\u4ee5\u901a\u8fc7\u66f4\u6539\u89c6\u56fe\u7684\u67e5\u8be2\u8bed\u53e5\u3001\u6dfb\u52a0\u6216\u5220\u9664\u89c6\u56fe\u7684\u5217\u7b49\u65b9\u5f0f\u6765\u4fee\u6539\u89c6\u56fe\u7684\u5b9a\u4e49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9bALTER VIEW\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n
        3.1 \u4fee\u6539\u89c6\u56fe\u7684\u67e5\u8be2\u8bed\u53e5\uff1a<\/p>\n
        ALTER VIEW \u89c6\u56fe\u540d\nAS \u65b0\u67e5\u8be2\u8bed\u53e5;<\/pre>\n
          \n
        1. ALTER PROCEDURE\u548cALTER FUNCTION\u8bed\u53e5\u7528\u4e8e\u4fee\u6539\u5b58\u50a8\u8fc7\u7a0b\u548c\u51fd\u6570\u7684\u5b9a\u4e49\u3002\u53ef\u4ee5\u901a\u8fc7\u66f4\u6539\u5b58\u50a8\u8fc7\u7a0b\u548c\u51fd\u6570\u7684\u53c2\u6570\u3001\u4fee\u6539\u8fd4\u56de\u503c\u3001\u66f4\u6539\u8fc7\u7a0b\u548c\u51fd\u6570\u4f53\u7b49\u65b9\u5f0f\u6765\u4fee\u6539\u5176\u5b9a\u4e49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9bALTER PROCEDURE\u548cALTER FUNCTION\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n
          4.1 \u4fee\u6539\u5b58\u50a8\u8fc7\u7a0b\u7684\u5b9a\u4e49\uff1a<\/p>\n
          ALTER PROCEDURE \u5b58\u50a8\u8fc7\u7a0b\u540d (\u53c2\u6570\u5217\u8868)\nAS\nBEGIN\n    -- \u65b0\u7684\u8fc7\u7a0b\u4f53\nEND;<\/pre>\n
          4.2 \u4fee\u6539\u51fd\u6570\u7684\u5b9a\u4e49\uff1a<\/p>\n
          ALTER FUNCTION \u51fd\u6570\u540d (\u53c2\u6570\u5217\u8868)\nRETURNS \u8fd4\u56de\u7c7b\u578b\nAS\nBEGIN\n    -- \u65b0\u7684\u51fd\u6570\u4f53\n    RETURN \u8fd4\u56de\u503c;\nEND;<\/pre>\n
          \u603b\u7ed3\uff1aALTER\u8bed\u53e5\u5728\u6570\u636e\u5e93\u7ba1\u7406\u4e2d\u626e\u6f14\u7740\u91cd\u8981\u7684\u89d2\u8272\uff0c\u5b83\u80fd\u591f\u5bf9\u8868\u3001\u7d22\u5f15\u3001\u89c6\u56fe\u3001\u5b58\u50a8\u8fc7\u7a0b\u548c\u51fd\u6570\u7b49\u6570\u636e\u5e93\u5bf9\u8c61\u8fdb\u884c\u4fee\u6539\u3002\u901a\u8fc7ALTER\u8bed\u53e5\uff0c\u6211\u4eec\u53ef\u4ee5\u6dfb\u52a0\u3001\u5220\u9664\u3001\u4fee\u6539\u8fd9\u4e9b\u5bf9\u8c61\u7684\u5b9a\u4e49\u548c\u5c5e\u6027\u3002\u672c\u6587\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5e38\u89c1\u7684ALTER\u8bed\u53e5\u793a\u4f8b\uff0c\u4ee5\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u638c\u63e1\u8fd9\u4e00SQL\u547d\u4ee4\u7684\u4f7f\u7528\u3002\u901a\u8fc7\u7075\u6d3b\u5e94\u7528ALTER\u8bed\u53e5\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u5bf9\u6570\u636e\u5e93\u5bf9\u8c61\u8fdb\u884c\u7ef4\u62a4\u548c\u66f4\u65b0\uff0c\u4ece\u800c\u66f4\u597d\u5730\u6ee1\u8db3\u4e1a\u52a1\u9700\u6c42\u3002<\/p>\n
          \u4ee5\u4e0a\u5c31\u662f\u300aSQL\u4e2dALTER\u8bed\u53e5\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eSQL,\u8bed\u53e5,ALTER\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n
          \n
          \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
          SQL\u4e2dALTER\u8bed\u53e5\u7684\u4f5c\u7528\u662f\u4ec0...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-199680","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199680","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=199680"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199680\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}