{"id":93,"date":"2023-11-17T12:13:00","date_gmt":"2023-11-17T04:13:00","guid":{"rendered":"http:\/\/www.cmd137blog.top\/?p=93"},"modified":"2024-12-08T18:03:16","modified_gmt":"2024-12-08T10:03:16","slug":"sql%e5%90%af%e5%8a%a8%ef%bc%81%e5%8f%8addl","status":"publish","type":"post","link":"http:\/\/www.cmd137blog.top\/?p=93","title":{"rendered":"SQL\u542f\u52a8\uff01\u53caDDL"},"content":{"rendered":"\n

# \u300a\u4e00\u300b\u3001\u57fa\u7840\u90e8\u5206<\/h2>\n\n\n\n

\u96f6\u3001Mysql\uff0c\u542f\u52a8\uff01\uff1a<\/h1>\n\n\n\n

\u9996\u5148\u786e\u4fdd\u670d\u52a1\u542f\u52a8\uff1a
<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u7528windows\u547d\u4ee4\u884c\u5de5\u5177\uff08\u60f3\u5728\u4efb\u610f\u76ee\u5f55\u4e0b\u6267\u884c\u6307\u4ee4\uff0c\u9700\u8981\u914d\u7f6ePATH\u73af\u5883\u53d8\u91cf\uff09\uff1a
\u542f\u52a8\u6307\u4ee4\uff1a<\/p>\n\n\n\n

<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
mysql <\/span>-<\/span>u root <\/span>-<\/span>p<\/span><\/span>\n\u540e\u8f93\u5165\u5bc6\u7801<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n

\u00b7\u6570\u636e\u6a21\u578b\uff1a<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u4e00\u3001SQL<\/h1>\n\n\n\n
1\u3001\u901a\u7528\u8bed\u6cd5\u53ca\u5206\u7c7b<\/h2>\n\n\n\n
\u00b7\u901a\u7528\u8bed\u6cd5\uff1a<\/strong><\/p>\n\n\n\n
\n
\u00b7\u53ef\u5355\u884c\u6216\u591a\u884c\uff0c\u4ee5\u5206\u53f7\u7ed3\u5c3e\uff1b
\u00b7\u7528\u7a7a\u683c\u3001\u7f29\u8fdb\u589e\u5f3a\u53ef\u8bfb\u6027
\u00b7MySQL\u7684SQL\u4e0d\u533a\u5206\u5927\u5c0f\u5199\uff0c\u4e00\u822c\u5173\u952e\u5b57\u5927\u5199
\u00b7\u6ce8\u91ca\uff1a
\u2002 \u2002\u5355\u884c\uff1a- – \u6216#\uff1b
\u2002 \u2002\u591a\u884c\uff1a\/* *\/<\/p>\n<\/blockquote>\n\n\n\n
\u00b7\u5206\u7c7b\uff1a<\/strong><\/p>\n\n\n\n
\n
DDL: \u6570\u636e\u5b9a\u4e49\u8bed\u8a00\uff0c\u7528\u6765\u5b9a\u4e49\u6570\u636e\u5e93\u5bf9\u8c61\uff08\u6570\u636e\u5e93\u3001\u8868\u3001\u5b57\u6bb5\uff09
DML: \u6570\u636e\u64cd\u4f5c\u8bed\u8a00\uff0c\u7528\u6765\u5bf9\u6570\u636e\u5e93\u8868\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u589e\u5220\u6539
DQL: \u6570\u636e\u67e5\u8be2\u8bed\u8a00\uff0c\u7528\u6765\u67e5\u8be2\u6570\u636e\u5e93\u4e2d\u8868\u7684\u8bb0\u5f55
DCL: \u6570\u636e\u63a7\u5236\u8bed\u8a00\uff0c\u7528\u6765\u521b\u5efa\u6570\u636e\u5e93\u7528\u6237\u3001\u63a7\u5236\u6570\u636e\u5e93\u7684\u63a7\u5236\u6743\u9650<\/p>\n<\/blockquote>\n\n\n\n
2\u3001DDL(\u6570\u636e\u5b9a\u4e49\u8bed\u8a00)\uff1a<\/h2>\n\n\n\n
1.\u6570\u636e\u5e93\u64cd\u4f5c<\/h4>\n\n\n\n
\u6ce8\uff1a\u3010\u3011\u5185\u53ef\u7701\u7565
\u00b7\u67e5\u8be2<\/strong>
\u2002 1.\u67e5\u8be2\u6240\u6709\u6570\u636e\u5e93<\/p>\n\n\n\n
SHOW DATABASES;<\/code><\/pre>\n\n\n\n
\u2002 2.\u67e5\u8be2\u5f53\u524d\u6570\u636e\u5e93<\/p>\n\n\n\n
SHOW DATABASE();<\/code><\/pre>\n\n\n\n
\u00b7\u521b\u5efa<\/strong>
\u2002 \u521b\u5efa\u6570\u636e\u5e93\uff1a<\/p>\n\n\n\n
CREATE DATABASE [ IF NOT EXISTS ] \u6570\u636e\u5e93\u540d [ DEFAULT CHARSET \u5b57\u7b26\u96c6] [COLLATE \u6392\u5e8f\u89c4\u5219 ];<\/code><\/pre>\n\n\n\n
\u2002 \u6ce8\u610f\uff1aUTF8\u5b57\u7b26\u96c6\u957f\u5ea6\u4e3a3\u5b57\u8282\uff0c\u6709\u4e9b\u7b26\u53f7\u53604\u5b57\u8282\uff0c\u6240\u4ee5\u63a8\u8350\u7528utf8mb4\u5b57\u7b26\u96c6<\/p>\n\n\n\n
\u00b7\u5220\u9664<\/strong><\/p>\n\n\n\n
DROP DATABASE [ IF EXISTS ] \u6570\u636e\u5e93\u540d;<\/code><\/pre>\n\n\n\n
\u00b7\u4f7f\u7528\u6570\u636e\u5e93<\/strong><\/p>\n\n\n\n
USE \u6570\u636e\u5e93\u540d;<\/code><\/pre>\n\n\n\n
    \n
  • \u6ce8\u610f\uff1aUTF8\u5b57\u7b26\u96c6\u957f\u5ea6\u4e3a3\u5b57\u8282\uff0c\u6709\u4e9b\u7b26\u53f7\u53604\u5b57\u8282\uff0c\u6240\u4ee5\u63a8\u8350\u7528utf8mb4\u5b57\u7b26\u96c6<\/li>\n<\/ul>\n\n\n\n
    2.\u8868\u64cd\u4f5c<\/h4>\n\n\n\n
      \n
    • \u67e5\u8be2\u5f53\u524d\u6570\u636e\u5e93\u6240\u6709\u8868\uff1a<\/li>\n<\/ul>\n\n\n\n
      SHOW TABLES;<\/code><\/pre>\n\n\n\n
        \n
      • \u67e5\u8be2\u8868\u7ed3\u6784\uff1a<\/li>\n<\/ul>\n\n\n\n
        DESC \u8868\u540d\uff1b<\/code><\/pre>\n\n\n\n
        \u67e5\u8be2\u6307\u5b9a\u8868\u7684\u5efa\u8868\u8bed\u53e5\uff1a<\/p>\n\n\n\n
        SHOW CREATE TABLE \u8868\u540d\uff1b<\/code><\/pre>\n\n\n\n
          \n
        • \u521b\u5efa\u8868\uff1a<\/li>\n<\/ul>\n\n\n\n
          CREATE TABLE \u8868\u540d(\n    \u5b57\u6bb51 \u5b57\u6bb51\u7c7b\u578b [\u7ea6\u675f] [COMMENT \u5b57\u6bb51\u6ce8\u91ca],\n    \u5b57\u6bb52 \u5b57\u6bb52\u7c7b\u578b [\u7ea6\u675f] [COMMENT \u5b57\u6bb52\u6ce8\u91ca],\n    \u5b57\u6bb53 \u5b57\u6bb53\u7c7b\u578b [\u7ea6\u675f] [COMMENT \u5b57\u6bb53\u6ce8\u91ca],\n    ...\n    \u5b57\u6bb5n \u5b57\u6bb5n\u7c7b\u578b [\u7ea6\u675f] [COMMENT \u5b57\u6bb5n\u6ce8\u91ca],\n)[COMMENT \u8868\u6ce8\u91ca];--\u6700\u540e\u4e00\u4e2a\u5b57\u6bb5\u540e\u6ca1\u6709\u9017\u53f7<\/code><\/pre>\n\n\n\n
          \u7ea6\u675f\uff1a<\/h4>\n\n\n\n
            \n
          • \u7ea6\u675f\u662f\u4f5c\u7528\u4e8e\u8868\u4e2d\u5b57\u6bb5\u4e0a\u7684\u89c4\u5219\uff0c\u7528\u4e8e\u9650\u5236\u5b58\u50a8\u5728\u8868\u4e2d\u7684\u6570\u636e\u3002<\/li>\n\n\n\n
          • \u4fdd\u8bc1\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u7684\u6b63\u786e\u6027\u3001\u6709\u6548\u6027\u3001\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n\n\n\n
            \u7ea6\u675f<\/th>\u63cf\u8ff0<\/th>\u5173\u952e\u5b57<\/th><\/tr><\/thead>
            \u975e\u7a7a\u7ea6\u675f<\/td>\u9650\u5236\u8be5\u5b57\u6bb5\u503c\u4e0d\u80fd\u4e3anull<\/td>not null<\/td><\/tr>
            \u552f\u4e00\u7ea6\u675f<\/td>\u4fdd\u8bc1\u5b57\u6bb5\u7684\u6240\u6709\u6570\u636e\u90fd\u662f\u552f\u4e00\u3001\u4e0d\u91cd\u590d\u7684<\/td>unique<\/td><\/tr>
            \u4e3b\u952e\u7ea6\u675f<\/td>\u4e3b\u952e\u662f\u4e00\u884c\u6570\u636e\u7684\u552f\u4e00\u6807\u8bc6\uff0c\u8981\u6c42\u975e\u7a7a\u4e14\u552f\u4e00<\/td>primary key\uff08auto_increment\uff09<\/td><\/tr>
            \u9ed8\u8ba4\u7ea6\u675f<\/td>\u4fdd\u5b58\u6570\u636e\u65f6\uff0c\u5982\u679c\u672a\u6307\u5b9a\u8be5\u5b57\u6bb5\u503c\uff0c\u5219\u91c7\u7528\u9ed8\u8ba4\u503c<\/td>default<\/td><\/tr>
            \u5916\u952e\u7ea6\u675f<\/td>\u8ba9\u4e24\u5f20\u8868\u7684\u6570\u636e\u5efa\u7acb\u8fde\u63a5\uff0c\u4fdd\u8bc1\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027<\/td>foreign key<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
              \n
            • \u6dfb\u52a0\u5b57\u6bb5\uff1a<\/li>\n<\/ul>\n\n\n\n
              ALTER TABLE \u8868\u540d ADD \u5b57\u6bb5\u540d \u7c7b\u578b [COMMENT \u6ce8\u91ca] [\u7ea6\u675f];<\/code><\/pre>\n\n\n\n
              \n\n\n\n
                \n
              • \u4fee\u6539\u5b57\u6bb5\u6570\u636e\u7c7b\u578b\uff1a<\/li>\n<\/ul>\n\n\n\n
                ALTER TABLE \u8868\u540d MODIFY \u5b57\u6bb5\u540d \u65b0\u6570\u636e\u7c7b\u578b;<\/code><\/pre>\n\n\n\n
                  \n
                • \u4fee\u6539\u5b57\u6bb5\u540d\u53ca\u5b57\u6bb5\u6570\u636e\u7c7b\u578b\uff1a<\/li>\n<\/ul>\n\n\n\n
                  ALTER TABLE \u8868\u540d CHANGE \u65e7\u5b57\u6bb5\u540d \u65b0\u5b57\u6bb5\u540d \u7c7b\u578b [COMMENT \u6ce8\u91ca] [\u7ea6\u675f];<\/code><\/pre>\n\n\n\n
                  \n\n\n\n
                    \n
                  • \u5220\u9664\u5b57\u6bb5\uff1a<\/li>\n<\/ul>\n\n\n\n
                    ALTER TABLE \u8868\u540d DROP \u5b57\u6bb5\u540d;<\/code><\/pre>\n\n\n\n
                      \n
                    • \u4fee\u6539\u8868\u540d\uff1a<\/li>\n<\/ul>\n\n\n\n
                      ALTER TABLE \u8868\u540d RENAME TO \u5b57\u6bb5\u540d\uff1b<\/code><\/pre>\n\n\n\n
                        \n
                      • \u5220\u9664\u8868\uff1a<\/li>\n<\/ul>\n\n\n\n
                        DROP TABLE [IF EXISTS] \u8868\u540d;<\/code><\/pre>\n\n\n\n
                          \n
                        • \u5220\u9664\u8868\uff0c\u5e76\u91cd\u65b0\u521b\u5efa\u8be5\u8868\uff1a<\/li>\n<\/ul>\n\n\n\n
                          TRUNCATE TABLE \u8868\u540d;<\/code><\/pre>\n\n\n\n
                          \u4ee5\u4e0a\u64cd\u4f5c\u76f4\u63a5\u7528idea\u7684\u56fe\u5f62\u5316\u754c\u9762\u76f4\u63a5\u64cd\u4f5c\u5373\u53ef\u3002<\/p>\n\n\n\n
                          \u6ce8\u610f\uff1a\u5f53\u8981\u65b0\u52a0\u5b57\u6bb5\u503c\uff0c\u5982\u679c\u88ab\u7ea6\u675f\u4e3a\u975e\u7a7a\uff0c\u90a3\u4e48\u4f1a\u81ea\u52a8\u7ed9\u5df2\u6709\u8bb0\u5f55\u8865\u4e0a\u65b0\u5b57\u6bb5\u5185\u5bb9\uff0c\u6b64\u65f6\u5982\u679c\u6709\u9650\u5236\uff0c\u5c31\u4f1a\u6dfb\u52a0\u5931\u8d25\u3002<\/p>\n\n\n\n
                          \u4f8b\u5982\u7ed9\u8868\u6dfb\u52a0\u65b0\u5b57\u6bb5\u65f6\u95f4 datetime\uff0c\u7ea6\u675f\u4e3a\u975e\u7a7a\uff0c\u5df2\u6709\u8bb0\u5f55\u4f1a\u586b\u5145\u65b0\u5b57\u6bb5\u4e3a0000\/00\/00-00-00-00\uff0c\u4f46\u662fdatetime\u7684\u5e74\u4efd\u65f6\u95f4\u4e0d\u5141\u8bb8\u4e3a0000\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                          # \u300a\u4e00\u300b\u3001\u57fa\u7840\u90e8\u5206 \u96f6\u3001Mysql\uff0c\u542f\u52a8\uff01\uff1a \u9996\u5148\u786e\u4fdd\u670d\u52a1\u542f\u52a8\uff1a \u7528windows\u547d\u4ee4\u884c\u5de5\u5177\uff08\u60f3\u5728\u4efb\u610f\u76ee\u5f55\u4e0b […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[9],"class_list":["post-93","post","type-post","status-publish","format-standard","hentry","category-sql","tag-9"],"_links":{"self":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/93","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=93"}],"version-history":[{"count":7,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/93\/revisions"}],"predecessor-version":[{"id":581,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/93\/revisions\/581"}],"wp:attachment":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=93"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=93"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=93"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}