{"id":199640,"date":"2025-05-06T09:45:21","date_gmt":"2025-05-06T01:45:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199640\/"},"modified":"2025-05-06T09:45:21","modified_gmt":"2025-05-06T01:45:21","slug":"mysql-%e5%b8%b8%e8%a7%81%e7%9a%84%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e5%8f%8a%e5%85%b6%e6%a6%82%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199640\/","title":{"rendered":"MySQL \u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\u53ca\u5176\u6982\u8ff0"},"content":{"rendered":"

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

MySQL \u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\u53ca\u5176\u6982\u8ff0<\/h1>\n

\u5728IT\u884c\u4e1a\u8fd9\u4e2a\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u5f88\u5feb\u7684\u884c\u4e1a\uff0c\u53ea\u6709\u4e0d\u505c\u6b62\u7684\u5b66\u4e60\uff0c\u624d\u4e0d\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u5982\u679c\u4f60\u662f\u6570\u636e\u5e93\u5b66\u4e60\u8005\uff0c\u90a3\u4e48\u672c\u6587\u300aMySQL \u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\u53ca\u5176\u6982\u8ff0\u300b\u5c31\u5f88\u9002\u5408\u4f60\uff01\u672c\u7bc7\u5185\u5bb9\u4e3b\u8981\u5305\u62ec##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

MySQL\u57fa\u672c\u6570\u636e\u7c7b\u578b\u6982\u8ff0\uff1a\u4e86\u89e3\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\u6709\u54ea\u4e9b\uff0c\u9700\u8981\u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/p>\n

MySQL\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5b83\u652f\u6301\u591a\u79cd\u6570\u636e\u7c7b\u578b\u3002\u4e86\u89e3\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u5bf9\u4e8e\u6b63\u786e\u7684\u6570\u636e\u5e93\u8bbe\u8ba1\u548c\u6570\u636e\u5b58\u50a8\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u5c06\u4ecb\u7ecdMySQL\u4e2d\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    \n
  1. \u6574\u578b\uff08INT\uff09<\/li>\n<\/ol>\n

    \u6574\u578b\u662f\u6700\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\u4e4b\u4e00\uff0c\u7528\u4e8e\u5b58\u50a8\u6574\u6570\u3002MySQL\u63d0\u4f9b\u4e86\u591a\u79cd\u6574\u578b\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd\uff1aTINYINT\uff08-128 to 127\uff09\uff0cSMALLINT\uff08-32768 to 32767\uff09\uff0cMEDIUMINT\uff08-8388608 to 8388607\uff09\uff0cINT\uff08-2147483648 to 2147483647\uff09\u548cBIGINT\uff08-9223372036854775808 to 9223372036854775807\uff09\u3002\u4e0b\u9762\u662f\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a”users”\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u6574\u578b\u7684id\u5b57\u6bb5\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n

    CREATE TABLE users (\n  id INT PRIMARY KEY,\n  username VARCHAR(255),\n  password VARCHAR(255)\n);<\/pre>\n
      \n
    1. \u6d6e\u70b9\u578b\uff08FLOAT\u548cDOUBLE\uff09<\/li>\n<\/ol>\n
      \u6d6e\u70b9\u578b\u7528\u4e8e\u5b58\u50a8\u5e26\u6709\u5c0f\u6570\u70b9\u7684\u6570\u5b57\u3002MySQL\u63d0\u4f9b\u4e86\u4e24\u79cd\u6d6e\u70b9\u578b\u6570\u636e\u7c7b\u578b\uff1aFLOAT\u548cDOUBLE\u3002FLOAT\u7528\u4e8e\u5b58\u50a8\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\uff0c\u800cDOUBLE\u7528\u4e8e\u5b58\u50a8\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3002\u4e0b\u9762\u662f\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a”products”\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u6d6e\u70b9\u578b\u7684price\u5b57\u6bb5\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
      CREATE TABLE products (\n  id INT PRIMARY KEY,\n  name VARCHAR(255),\n  price FLOAT(10, 2),\n  description TEXT\n);<\/pre>\n
        \n
      1. \u5b57\u7b26\u4e32\u578b\uff08VARCHAR\u548cTEXT\uff09<\/li>\n<\/ol>\n
        \u5b57\u7b26\u4e32\u578b\u7528\u4e8e\u5b58\u50a8\u6587\u672c\u6570\u636e\u3002MySQL\u63d0\u4f9b\u4e86\u4e24\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u578b\u6570\u636e\u7c7b\u578b\uff1aVARCHAR\u548cTEXT\u3002VARCHAR\u7528\u4e8e\u5b58\u50a8\u53ef\u53d8\u957f\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u800cTEXT\u7528\u4e8e\u5b58\u50a8\u8f83\u5927\u7684\u6587\u672c\u6570\u636e\u3002\u4e0b\u9762\u662f\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a”comments”\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2aVARCHAR\u7c7b\u578b\u7684name\u5b57\u6bb5\u548c\u4e00\u4e2aTEXT\u7c7b\u578b\u7684content\u5b57\u6bb5\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
        CREATE TABLE comments (\n  id INT PRIMARY KEY,\n  name VARCHAR(255),\n  content TEXT,\n  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\n);<\/pre>\n
          \n
        1. \u65e5\u671f\u548c\u65f6\u95f4\u578b\uff08DATE\u3001TIME\u548cDATETIME\uff09<\/li>\n<\/ol>\n
          \u65e5\u671f\u548c\u65f6\u95f4\u578b\u7528\u4e8e\u5b58\u50a8\u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e\u3002MySQL\u63d0\u4f9b\u4e86\u591a\u79cd\u65e5\u671f\u548c\u65f6\u95f4\u578b\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ecDATE\u3001TIME\u548cDATETIME\u3002DATE\u7528\u4e8e\u5b58\u50a8\u65e5\u671f\uff0cTIME\u7528\u4e8e\u5b58\u50a8\u65f6\u95f4\uff0c\u800cDATETIME\u7528\u4e8e\u5b58\u50a8\u65e5\u671f\u548c\u65f6\u95f4\u7684\u7ec4\u5408\u3002\u4e0b\u9762\u662f\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a”orders”\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2aDATE\u7c7b\u578b\u7684order_date\u5b57\u6bb5\u548c\u4e00\u4e2aTIME\u7c7b\u578b\u7684order_time\u5b57\u6bb5\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
          CREATE TABLE orders (\n  id INT PRIMARY KEY,\n  order_date DATE,\n  order_time TIME\n);<\/pre>\n
            \n
          1. \u679a\u4e3e\u578b\uff08ENUM\uff09<\/li>\n<\/ol>\n
            \u679a\u4e3e\u578b\u7528\u4e8e\u5b58\u50a8\u9884\u5b9a\u4e49\u7684\u503c\u5217\u8868\u3002MySQL\u4e2d\u7684ENUM\u6570\u636e\u7c7b\u578b\u5141\u8bb8\u60a8\u4e3a\u5217\u6307\u5b9a\u4e00\u4e2a\u56fa\u5b9a\u7684\u503c\u96c6\u3002\u4e0b\u9762\u662f\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a”colors”\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2aENUM\u7c7b\u578b\u7684color\u5b57\u6bb5\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
            CREATE TABLE colors (\n  id INT PRIMARY KEY,\n  color ENUM('red', 'green', 'blue')\n);<\/pre>\n
            \u603b\u7ed3:<\/p>\n
            \u672c\u6587\u5bf9MySQL\u4e2d\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\u8fdb\u884c\u4e86\u6982\u8ff0\uff0c\u5305\u62ec\u6574\u578b\u3001\u6d6e\u70b9\u578b\u3001\u5b57\u7b26\u4e32\u578b\u3001\u65e5\u671f\u548c\u65f6\u95f4\u578b\u4ee5\u53ca\u679a\u4e3e\u578b\u3002\u4e86\u89e3\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u5bf9\u4e8e\u6b63\u786e\u7684\u6570\u636e\u5e93\u8bbe\u8ba1\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u60a8\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u5e76\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u4f7f\u7528\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u3002\u5e0c\u671b\u672c\u6587\u80fd\u591f\u5e2e\u52a9\u60a8\u52a0\u6df1\u5bf9MySQL\u6570\u636e\u7c7b\u578b\u7684\u7406\u89e3\uff0c\u4e3a\u6570\u636e\u5e93\u7684\u8bbe\u8ba1\u548c\u5f00\u53d1\u63d0\u4f9b\u6307\u5bfc\u3002<\/p>\n
            \u6587\u4e2d\u5173\u4e8emysql,\u6570\u636e\u7c7b\u578b,\u5e38\u7528\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300aMySQL \u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\u53ca\u5176\u6982\u8ff0\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n
            \n
            \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
            MySQL \u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\u53ca\u5176\u6982...<\/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-199640","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199640","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=199640"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199640\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199640"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199640"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}