{"id":199635,"date":"2025-05-06T09:06:02","date_gmt":"2025-05-06T01:06:02","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199635\/"},"modified":"2025-05-06T09:06:02","modified_gmt":"2025-05-06T01:06:02","slug":"sql%e8%a7%a3%e5%af%86%ef%bc%9a%e6%8f%ad%e5%bc%80%e5%85%b6%e6%84%8f%e4%b9%89%e4%b8%8e%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199635\/","title":{"rendered":"SQL\u89e3\u5bc6\uff1a\u63ed\u5f00\u5176\u610f\u4e49\u4e0e\u5e94\u7528"},"content":{"rendered":"

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

SQL\u89e3\u5bc6\uff1a\u63ed\u5f00\u5176\u610f\u4e49\u4e0e\u5e94\u7528<\/h1>\n

\u6700\u8fd1\u53d1\u73b0\u4e0d\u5c11\u5c0f\u4f19\u4f34\u90fd\u5bf9\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u4eca\u5929\u7ee7\u7eed\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u76f8\u5173\u7684\u77e5\u8bc6\uff0c\u672c\u6587\u4e3b\u8981\u5185\u5bb9\u6d89\u53ca\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01\u5f53\u7136\u5982\u679c\u9605\u8bfb\u672c\u6587\u65f6\u5b58\u5728\u4e0d\u540c\u60f3\u6cd5\uff0c\u53ef\u4ee5\u5728\u8bc4\u8bba\u4e2d\u8868\u8fbe\uff0c\u4f46\u662f\u8bf7\u52ff\u4f7f\u7528\u8fc7\u6fc0\u7684\u63aa\u8f9e~<\/p>\n

\u89e3\u5bc6SQL\uff1a\u63ed\u79d8\u5176\u610f\u601d\u4e0e\u7528\u9014\uff0c\u9700\u8981\u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/p>\n

\u6458\u8981\uff1a
SQL\uff08Structured Query Language\uff09\u662f\u4e00\u79cd\u7528\u4e8e\u7ba1\u7406\u548c\u64cd\u4f5c\u5173\u7cfb\u6570\u636e\u5e93\u7684\u7f16\u7a0b\u8bed\u8a00\u3002\u5728\u73b0\u4ee3\u4fe1\u606f\u5316\u65f6\u4ee3\uff0c\u5927\u91cf\u7684\u6570\u636e\u9700\u8981\u88ab\u50a8\u5b58\u3001\u68c0\u7d22\u548c\u5206\u6790\uff0cSQL\u5c31\u6210\u4e3a\u4e86\u5904\u7406\u8fd9\u4e9b\u5de5\u4f5c\u7684\u91cd\u8981\u5de5\u5177\u4e4b\u4e00\u3002\u672c\u6587\u5c06\u901a\u8fc7\u8bb2\u89e3SQL\u7684\u5b9a\u4e49\u3001\u57fa\u672c\u8bed\u6cd5\u548c\u5e38\u7528\u7528\u9014\u6765\u63ed\u793a\u5176\u610f\u4e49\u548c\u91cd\u8981\u6027\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u5e2e\u52a9\u8bfb\u8005\u7406\u89e3\u548c\u5e94\u7528SQL\u3002<\/p>\n

\u4e00\u3001SQL\u7684\u5b9a\u4e49\u548c\u57fa\u672c\u8bed\u6cd5
SQL\u662f\u7ed3\u6784\u5316\u67e5\u8be2\u8bed\u8a00\uff08Structured Query Language\uff09\u7684\u7b80\u79f0\uff0c\u662f\u4e00\u79cd\u7528\u4e8e\u7ba1\u7406\u548c\u64cd\u4f5c\u5173\u7cfb\u6570\u636e\u5e93\u7684\u6807\u51c6\u5316\u7f16\u7a0b\u8bed\u8a00\u3002\u5176\u57fa\u672c\u8bed\u6cd5\u5305\u542b\u4e86\u5bf9\u6570\u636e\u5e93\u8fdb\u884c\u589e\u5220\u6539\u67e5\u7684\u64cd\u4f5c\uff0c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u90e8\u5206\uff1a<\/p>\n

    \n
  1. \n

    \u6570\u636e\u5b9a\u4e49\u8bed\u8a00\uff08Data Definition Language\uff0cDDL\uff09\uff1a\u7528\u4e8e\u5b9a\u4e49\u548c\u7ba1\u7406\u6570\u636e\u5e93\u7684\u7ed3\u6784\uff0c\u5305\u62ec\u521b\u5efa\u8868\u3001\u4fee\u6539\u8868\u7ed3\u6784\u4ee5\u53ca\u5220\u9664\u8868\u7b49\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a”students”\u7684\u8868\uff1a<\/p>\n

    CREATE TABLE students (\nid INT PRIMARY KEY,\nname VARCHAR(100),\nage INT\n);<\/pre>\n<\/li>\n
  2. \n
    \u6570\u636e\u64cd\u4f5c\u8bed\u8a00\uff08Data Manipulation Language\uff0cDML\uff09\uff1a\u7528\u4e8e\u5bf9\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u589e\u3001\u5220\u3001\u6539\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u5411”students”\u8868\u4e2d\u63d2\u5165\u4e00\u6761\u8bb0\u5f55\uff1a<\/p>\n
    INSERT INTO students (id, name, age) VALUES (1, '\u5f20\u4e09', 20);<\/pre>\n<\/li>\n
  3. \n
    \u6570\u636e\u67e5\u8be2\u8bed\u8a00\uff08Data Query Language\uff0cDQL\uff09\uff1a\u7528\u4e8e\u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\u6240\u9700\u7684\u6570\u636e\u3002\u4f8b\u5982\uff0c\u67e5\u8be2”students”\u8868\u4e2d\u7684\u6240\u6709\u8bb0\u5f55\uff1a<\/p>\n
    SELECT * FROM students;<\/pre>\n<\/li>\n<\/ol>\n
    \u4e8c\u3001SQL\u5e38\u7528\u7528\u9014
    SQL\u4f5c\u4e3a\u4e00\u79cd\u91cd\u8981\u7684\u6570\u636e\u5e93\u67e5\u8be2\u8bed\u8a00\uff0c\u5176\u5728\u4fe1\u606f\u5316\u65f6\u4ee3\u4e2d\u6709\u7740\u5e7f\u6cdb\u7684\u7528\u9014\u3002\u4ee5\u4e0b\u662fSQL\u5e38\u89c1\u7684\u5e94\u7528\u573a\u666f\u548c\u7528\u9014\uff1a<\/p>\n
      \n
    1. \u6570\u636e\u5b58\u50a8\u548c\u7ba1\u7406\uff1aSQL\u53ef\u4ee5\u7528\u4e8e\u521b\u5efa\u6570\u636e\u5e93\u3001\u5efa\u7acb\u6570\u636e\u8868\u4ee5\u53ca\u5b9a\u4e49\u6570\u636e\u5b57\u6bb5\u7b49\u64cd\u4f5c\uff0c\u4f7f\u5f97\u6570\u636e\u53ef\u4ee5\u88ab\u6709\u6548\u5730\u50a8\u5b58\u548c\u7ba1\u7406\u3002<\/li>\n
    2. \u6570\u636e\u67e5\u8be2\u548c\u5206\u6790\uff1aSQL\u7684\u6700\u4e3b\u8981\u529f\u80fd\u5c31\u662f\u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\u6240\u9700\u7684\u6570\u636e\uff0c\u901a\u8fc7\u7075\u6d3b\u7684\u6761\u4ef6\u8fc7\u6ee4\u3001\u6392\u5e8f\u548c\u805a\u5408\u7b49\u64cd\u4f5c\uff0c\u5b9e\u73b0\u5bf9\u6570\u636e\u7684\u9ad8\u6548\u68c0\u7d22\u548c\u5206\u6790\u3002<\/li>\n
    3. \u6570\u636e\u5e93\u7684\u66f4\u65b0\u548c\u7ef4\u62a4\uff1aSQL\u63d0\u4f9b\u4e86\u5bf9\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u589e\u3001\u5220\u3001\u6539\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u6570\u636e\u5e93\u5185\u5bb9\u7684\u66f4\u65b0\u548c\u7ef4\u62a4\u3002<\/li>\n
    4. \u6570\u636e\u5e93\u7684\u5907\u4efd\u548c\u6062\u590d\uff1aSQL\u8fd8\u53ef\u4ee5\u7528\u4e8e\u6570\u636e\u5e93\u7684\u5907\u4efd\u548c\u6062\u590d\uff0c\u786e\u4fdd\u6570\u636e\u7684\u5b89\u5168\u548c\u5b8c\u6574\u6027\u3002<\/li>\n
    5. \u6570\u636e\u5e93\u7684\u5b89\u5168\u6027\u548c\u6743\u9650\u7ba1\u7406\uff1aSQL\u53ef\u4ee5\u8bbe\u7f6e\u7528\u6237\u7684\u8bbf\u95ee\u6743\u9650\u548c\u89d2\u8272\uff0c\u4fdd\u8bc1\u6570\u636e\u5e93\u7684\u5b89\u5168\u6027\u548c\u53ef\u63a7\u6027\u3002<\/li>\n<\/ol>\n
      \u4e09\u3001SQL\u4ee3\u7801\u793a\u4f8b
      \u4e3a\u4e86\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528SQL\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n
        \n
      1. \n
        \u521b\u5efa\u8868\uff1a<\/p>\n
        CREATE TABLE employees (\n  id INT PRIMARY KEY,\n  name VARCHAR(100),\n  age INT,\n  department VARCHAR(100)\n);<\/pre>\n<\/li>\n
      2. \n
        \u63d2\u5165\u6570\u636e\uff1a<\/p>\n
        INSERT INTO employees (id, name, age, department)\nVALUES\n  (1, 'John', 25, 'HR'),\n  (2, 'Lisa', 28, 'Finance'),\n  (3, 'Mike', 30, 'IT');<\/pre>\n<\/li>\n
      3. \n
        \u67e5\u8be2\u6570\u636e\uff1a<\/p>\n
        SELECT * FROM employees;<\/pre>\n<\/li>\n
      4. \n
        \u66f4\u65b0\u8bb0\u5f55\uff1a<\/p>\n
        UPDATE employees \nSET age = 31 \nWHERE name = 'Mike';<\/pre>\n<\/li>\n
      5. \n
        \u5220\u9664\u8bb0\u5f55\uff1a<\/p>\n
        DELETE FROM employees \nWHERE age > 30;<\/pre>\n<\/li>\n<\/ol>\n
        \u901a\u8fc7\u4ee5\u4e0a\u7684SQL\u4ee3\u7801\u793a\u4f8b\uff0c\u8bfb\u8005\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3SQL\u7684\u7528\u6cd5\u548c\u65b9\u5f0f\uff0c\u4ece\u800c\u66f4\u52a0\u719f\u7ec3\u5730\u8fdb\u884c\u6570\u636e\u5e93\u7ba1\u7406\u548c\u64cd\u4f5c\u3002<\/p>\n
        \u7ed3\u8bba\uff1a
        SQL\u4f5c\u4e3a\u4e00\u79cd\u91cd\u8981\u7684\u6570\u636e\u5e93\u67e5\u8be2\u8bed\u8a00\uff0c\u5728\u73b0\u4ee3\u4fe1\u606f\u5316\u65f6\u4ee3\u4e2d\u7684\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\u3002\u901a\u8fc7\u5b66\u4e60\u548c\u5e94\u7528SQL\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u597d\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u5173\u7cfb\u6570\u636e\u5e93\uff0c\u5b9e\u73b0\u6570\u636e\u7684\u9ad8\u6548\u5b58\u50a8\u3001\u67e5\u8be2\u548c\u5206\u6790\u3002\u5e0c\u671b\u672c\u6587\u63d0\u4f9b\u7684\u4ee3\u7801\u793a\u4f8b\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3SQL\u7684\u610f\u4e49\u548c\u7528\u9014\uff0c\u4ece\u800c\u66f4\u597d\u5730\u5e94\u7528SQL\u8fdb\u884c\u6570\u636e\u7ba1\u7406\u548c\u64cd\u4f5c\u3002<\/p>\n
        \u4ee5\u4e0a\u5c31\u662f\u300aSQL\u89e3\u5bc6\uff1a\u63ed\u5f00\u5176\u610f\u4e49\u4e0e\u5e94\u7528\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eSQL,\u89e3\u5bc6,\u7528\u9014\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\u89e3\u5bc6\uff1a\u63ed\u5f00\u5176\u610f\u4e49\u4e0e\u5e94\u7528 \u6700...<\/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-199635","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199635","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=199635"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199635\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199635"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199635"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}