{"id":199634,"date":"2025-05-06T08:17:06","date_gmt":"2025-05-06T00:17:06","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199634\/"},"modified":"2025-05-06T08:17:06","modified_gmt":"2025-05-06T00:17:06","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3sql%ef%bc%9a%e6%8e%a2%e7%a9%b6%e5%85%b6%e6%9c%ac%e8%b4%a8%e4%b8%8e%e6%a6%82%e5%bf%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199634\/","title":{"rendered":"\u6df1\u5165\u7406\u89e3SQL\uff1a\u63a2\u7a76\u5176\u672c\u8d28\u4e0e\u6982\u5ff5"},"content":{"rendered":"

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

\u6df1\u5165\u7406\u89e3SQL\uff1a\u63a2\u7a76\u5176\u672c\u8d28\u4e0e\u6982\u5ff5<\/h1>\n

\u5c0f\u4f19\u4f34\u4eec\u6709\u6ca1\u6709\u89c9\u5f97\u5b66\u4e60\u5f88\u6709\u610f\u601d\uff1f\u6709\u610f\u601d\u5c31\u5bf9\u4e86\uff01\u4eca\u5929\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765\uff0c\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230\uff0c\u82e5\u662f\u5728\u5b66\u4e60\u4e2d\u5bf9\u5176\u4e2d\u90e8\u5206\u77e5\u8bc6\u70b9\u6709\u7591\u95ee\uff0c\u6216\u8bb8\u770b\u4e86\u672c\u6587\u5c31\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n

\u63a2\u7d22SQL\u7684\u672c\u8d28\uff1a\u7406\u89e3\u5176\u610f\u4e49\u4e0e\u6982\u5ff5\uff0c\u9700\u8981\u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/p>\n

\u5f15\u8a00\uff1a
SQL (Structured Query Language) \u662f\u4e00\u79cd\u7528\u4e8e\u7ba1\u7406\u548c\u64cd\u4f5c\u5173\u7cfb\u6570\u636e\u5e93\u7684\u6807\u51c6\u7f16\u7a0b\u8bed\u8a00\u3002\u65e0\u8bba\u662f\u5728\u4e2a\u4eba\u8ba1\u7b97\u673a\u4e0a\u7684\u7b80\u5355\u6570\u636e\u5e93\uff0c\u8fd8\u662f\u5728\u5927\u578b\u4f01\u4e1a\u7cfb\u7edf\u4e2d\u7684\u590d\u6742\u6570\u636e\u4ed3\u5e93\uff0cSQL\u90fd\u626e\u6f14\u7740\u5173\u952e\u7684\u89d2\u8272\u3002\u672c\u6587\u5c06\u63a2\u8ba8SQL\u7684\u672c\u8d28\uff0c\u7406\u89e3\u5176\u610f\u4e49\u4e0e\u6982\u5ff5\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u4ee5\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u5b66\u4e60\u548c\u5e94\u7528SQL\u3002<\/p>\n

\u4e00\u3001SQL\u7684\u672c\u8d28\u4e0e\u610f\u4e49
SQL\u4f5c\u4e3a\u4e00\u79cd\u6807\u51c6\u5316\u7684\u6570\u636e\u5e93\u67e5\u8be2\u8bed\u8a00\uff0c\u6709\u52a9\u4e8e\u7edf\u4e00\u548c\u7b80\u5316\u4e0e\u6570\u636e\u5e93\u7684\u4ea4\u4e92\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u901a\u7528\u7684\u65b9\u6cd5\u6765\u5bf9\u6570\u636e\u6267\u884c\u67e5\u8be2\u3001\u63d2\u5165\u3001\u66f4\u65b0\u548c\u5220\u9664\u7b49\u64cd\u4f5c\u3002SQL\u7684\u672c\u8d28\u5728\u4e8e\u5176\u5bf9\u6570\u636e\u7684\u5173\u7cfb\u6027\u7684\u5904\u7406\u548c\u64cd\u4f5c\uff0c\u5b83\u901a\u8fc7\u4f7f\u7528\u8868\u3001\u884c\u548c\u5217\u7684\u6982\u5ff5\u6765\u7ec4\u7ec7\u548c\u7ba1\u7406\u6570\u636e\u3002SQL\u7684\u610f\u4e49\u4f53\u73b0\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n

    \n
  1. \u6570\u636e\u7684\u7ec4\u7ec7\u4e0e\u5b58\u50a8\uff1aSQL\u63d0\u4f9b\u4e86\u521b\u5efa\u548c\u7ba1\u7406\u8868\u7684\u8bed\u6cd5\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5b9a\u4e49\u8868\u7684\u7ed3\u6784\u548c\u5b57\u6bb5\u7684\u5c5e\u6027\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528CREATE TABLE\u8bed\u53e5\u521b\u5efa\u4e00\u4e2a\u5b66\u751f\u8868\uff0c\u5e76\u5b9a\u4e49\u5b66\u53f7\u3001\u59d3\u540d\u3001\u5e74\u9f84\u7b49\u5b57\u6bb5\u3002\u8fd9\u6837\u53ef\u4ee5\u7b80\u5355\u3001\u7ed3\u6784\u5316\u5730\u5b58\u50a8\u548c\u7ec4\u7ec7\u6570\u636e\u3002<\/li>\n
  2. \u6570\u636e\u7684\u67e5\u8be2\u4e0e\u68c0\u7d22\uff1aSQL\u63d0\u4f9b\u4e86SELECT\u8bed\u53e5\uff0c\u53ef\u4ee5\u6839\u636e\u6761\u4ef6\u4ece\u8868\u4e2d\u68c0\u7d22\u6240\u9700\u7684\u6570\u636e\u3002SELECT\u8bed\u53e5\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fd4\u56de\u7279\u5b9a\u7684\u884c\u548c\u5217\uff0c\u53ef\u4ee5\u8fdb\u884c\u6392\u5e8f\u3001\u8fc7\u6ee4\u548c\u6c47\u603b\u7b49\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528SELECT * FROM student WHERE age > 20\uff0c\u67e5\u8be2\u5e74\u9f84\u5927\u4e8e20\u5c81\u7684\u5b66\u751f\u4fe1\u606f\u3002<\/li>\n
  3. \u6570\u636e\u7684\u589e\u52a0\u4e0e\u4fee\u6539\uff1aSQL\u63d0\u4f9b\u4e86INSERT\u8bed\u53e5\u548cUPDATE\u8bed\u53e5\uff0c\u53ef\u4ee5\u5411\u8868\u4e2d\u63d2\u5165\u65b0\u7684\u6570\u636e\u6216\u4fee\u6539\u5df2\u6709\u6570\u636e\u3002INSERT\u8bed\u53e5\u7528\u4e8e\u65b0\u589e\u4e00\u884c\u8bb0\u5f55\uff0cUPDATE\u8bed\u53e5\u7528\u4e8e\u66f4\u65b0\u5df2\u6709\u7684\u8bb0\u5f55\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528INSERT INTO student (id, name, age) VALUES (1, ‘\u5f20\u4e09’, 22)\uff0c\u63d2\u5165\u4e00\u4e2a\u5b66\u751f\u7684\u4fe1\u606f\uff1b\u4f7f\u7528UPDATE student SET age = 23 WHERE id = 1\uff0c\u5c06id\u4e3a1\u7684\u5b66\u751f\u5e74\u9f84\u66f4\u65b0\u4e3a23\u3002<\/li>\n
  4. \u6570\u636e\u7684\u5220\u9664\u4e0e\u6e05\u9664\uff1aSQL\u63d0\u4f9b\u4e86DELETE\u8bed\u53e5\uff0c\u7528\u4e8e\u4ece\u8868\u4e2d\u5220\u9664\u6307\u5b9a\u7684\u884c\u3002DELETE\u8bed\u53e5\u53ef\u4ee5\u57fa\u4e8e\u6761\u4ef6\u5220\u9664\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u7684\u6570\u636e\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528DELETE FROM student WHERE age > 25\uff0c\u5c06\u5e74\u9f84\u5927\u4e8e25\u5c81\u7684\u5b66\u751f\u4fe1\u606f\u4ece\u6570\u636e\u5e93\u4e2d\u5220\u9664\u3002<\/li>\n<\/ol>\n

    \u4e8c\u3001SQL\u7684\u57fa\u672c\u6982\u5ff5\u53ca\u793a\u4f8b\u4ee3\u7801
    \u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3SQL\u7684\u6982\u5ff5\uff0c\u4e0b\u9762\u5c06\u4ecb\u7ecdSQL\u4e2d\u7684\u4e00\u4e9b\u57fa\u672c\u5173\u952e\u8bcd\u548c\u8bed\u6cd5\uff0c\u5e76\u7ed3\u5408\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u8bf4\u660e\uff1a<\/p>\n

      \n
    1. \u5efa\u7acb\u8868\u683c\uff1a
      \u4f7f\u7528CREATE TABLE\u8bed\u53e5\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u8868\u3002\u4f8b\u5982\uff0c\u521b\u5efa\u4e00\u4e2a\u8868\u793a\u5b66\u751f\u4fe1\u606f\u7684\u8868\u683c\uff1a<\/li>\n<\/ol>\n

      CREATE TABLE student (
      id INT PRIMARY KEY,
      name VARCHAR(20),
      age INT
      );<\/p>\n

        \n
      1. \u63d2\u5165\u6570\u636e\uff1a
        \u4f7f\u7528INSERT INTO\u8bed\u53e5\u5c06\u6570\u636e\u63d2\u5165\u8868\u4e2d\u3002\u4f8b\u5982\uff0c\u5411student\u8868\u4e2d\u63d2\u5165\u4e00\u6761\u5b66\u751f\u4fe1\u606f\u8bb0\u5f55\uff1a<\/li>\n<\/ol>\n

        INSERT INTO student (id, name, age) VALUES (1, ‘\u5f20\u4e09’, 22);<\/p>\n

          \n
        1. \u67e5\u8be2\u6570\u636e\uff1a
          \u4f7f\u7528SELECT\u8bed\u53e5\u53ef\u4ee5\u4ece\u8868\u4e2d\u68c0\u7d22\u6570\u636e\u3002\u4f8b\u5982\uff0c\u67e5\u8be2student\u8868\u4e2d\u5e74\u9f84\u5927\u4e8e20\u5c81\u7684\u5b66\u751f\u4fe1\u606f\uff1a<\/li>\n<\/ol>\n

          SELECT * FROM student WHERE age > 20;<\/p>\n

            \n
          1. \u66f4\u65b0\u6570\u636e\uff1a
            \u4f7f\u7528UPDATE\u8bed\u53e5\u53ef\u4ee5\u66f4\u65b0\u8868\u4e2d\u7684\u6570\u636e\u3002\u4f8b\u5982\uff0c\u5c06id\u4e3a1\u7684\u5b66\u751f\u5e74\u9f84\u66f4\u65b0\u4e3a23\uff1a<\/li>\n<\/ol>\n

            UPDATE student SET age = 23 WHERE id = 1;<\/p>\n

              \n
            1. \u5220\u9664\u6570\u636e\uff1a
              \u4f7f\u7528DELETE FROM\u8bed\u53e5\u53ef\u4ee5\u5220\u9664\u4e00\u6761\u6216\u591a\u6761\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\u3002\u4f8b\u5982\uff0c\u5220\u9664\u5e74\u9f84\u5927\u4e8e25\u5c81\u7684\u5b66\u751f\u4fe1\u606f\uff1a<\/li>\n<\/ol>\n

              DELETE FROM student WHERE age > 25;<\/p>\n

              \u7ed3\u8bba\uff1a
              \u672c\u6587\u4eceSQL\u7684\u672c\u8d28\u4e0e\u610f\u4e49\u51fa\u53d1\uff0c\u63a2\u8ba8\u4e86\u5176\u5bf9\u6570\u636e\u7684\u7ec4\u7ec7\u3001\u67e5\u8be2\u3001\u589e\u52a0\u3001\u4fee\u6539\u548c\u5220\u9664\u7b49\u64cd\u4f5c\u3002\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u8bfb\u8005\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3SQL\u7684\u6982\u5ff5\u4e0e\u8bed\u6cd5\uff0c\u5e76\u5728\u5b9e\u8df5\u4e2d\u7075\u6d3b\u5e94\u7528\u3002\u5bf9\u4e8e\u6570\u636e\u5e93\u7684\u7ba1\u7406\u548c\u64cd\u4f5c\uff0cSQL\u662f\u4e00\u79cd\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\u548c\u6280\u80fd\u3002\u8fdb\u4e00\u6b65\u638c\u63e1SQL\uff0c\u5c06\u6709\u52a9\u4e8e\u63d0\u9ad8\u5bf9\u6570\u636e\u7684\u7ba1\u7406\u548c\u5904\u7406\u80fd\u529b\uff0c\u5e76\u4e14\u80fd\u591f\u66f4\u9ad8\u6548\u5730\u4e0e\u5404\u79cd\u7c7b\u578b\u7684\u6570\u636e\u5e93\u7cfb\u7edf\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n

              \u672c\u7bc7\u5173\u4e8e\u300a\u6df1\u5165\u7406\u89e3SQL\uff1a\u63a2\u7a76\u5176\u672c\u8d28\u4e0e\u6982\u5ff5\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6570\u636e\u5e93\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n

              \n
              \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"

              \u6df1\u5165\u7406\u89e3SQL\uff1a\u63a2\u7a76\u5176\u672c\u8d28\u4e0e\u6982\u5ff5...<\/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-199634","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199634","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=199634"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199634\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}