{"id":143288,"date":"2022-03-01T21:20:12","date_gmt":"2022-03-01T13:20:12","guid":{"rendered":"http:\/\/www.idc.net\/help\/143288\/"},"modified":"2022-03-01T21:20:12","modified_gmt":"2022-03-01T13:20:12","slug":"sql%e6%95%b0%e6%8d%ae%e5%ba%93%e5%88%9d%e5%ad%a6%e8%80%85%e6%95%99%e7%a8%8b%ef%bc%9a%e5%a6%82%e4%bd%95%e5%88%9b%e5%bb%ba%e8%87%aa%e5%b7%b1%e7%9a%84%e6%95%b0%e6%8d%ae%e5%ba%93%ef%bc%9f-sql%e6%80%8e","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/143288\/","title":{"rendered":"SQL\u6570\u636e\u5e93\u521d\u5b66\u8005\u6559\u7a0b\uff1a\u5982\u4f55\u521b\u5efa\u81ea\u5df1\u7684\u6570\u636e\u5e93\uff1f (sql\u600e\u4e48\u521b\u5efa\u6211\u7684\u6570\u636e\u5e93)"},"content":{"rendered":"<p>\u5728\u73b0\u4ee3\u4fe1\u606f\u5316\u7684\u65f6\u4ee3\uff0c\u5bf9\u4e8e\u8f6f\u4ef6\u5f00\u53d1\u4eba\u5458\u6765\u8bf4\uff0c\u6570\u636e\u5e93\u53ef\u8c13\u662f\u6700\u4e3a\u57fa\u7840\u548c\u5173\u952e\u7684\u8981\u7d20\u4e4b\u4e00\u3002\u6570\u636e\u5e93\u662f\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u4e2d\u5e38\u7528\u7684\u6570\u636e\u5b58\u50a8\u65b9\u5f0f\uff0c\u5176\u529f\u80fd\u5f3a\u5927\uff0c\u5177\u6709\u9ad8\u6548\u3001\u5b89\u5168\u3001\u53ef\u7ef4\u62a4\u7b49\u4f18\u70b9\u3002\u6570\u636e\u5e93\u662f\u5e94\u7528\u7a0b\u5e8f\u7684\u6838\u5fc3\uff0c\u53ef\u4ee5\u5feb\u901f\u5b58\u50a8\u3001\u68c0\u7d22\u548c\u5c55\u793a\u6570\u636e\u3002\u672c\u6587\u5c06\u4f1a\u4e3a\u521d\u5b66\u8005\u4ecb\u7ecd\u5982\u4f55\u521b\u5efa\u81ea\u5df1\u7684\u6570\u636e\u5e93\u3002<\/p>\n<p>\u4ec0\u4e48\u662f\u6570\u636e\u5e93\uff1f<\/p>\n<p>\u5728\u8ba1\u7b97\u673a\u79d1\u5b66\u9886\u57df\uff0c\u6570\u636e\u5e93\u662f\u4e00\u7ec4\u8fde\u7eed\u5b58\u50a8\u7684\u6570\u636e\uff0c\u53ef\u8fdb\u884c\u5feb\u901f\u5b58\u50a8\u548c\u8bbf\u95ee\u3002\u6570\u636e\u5e93\u7cfb\u7edf\u53ef\u4ee5\u5904\u7406\u5927\u91cf\u6570\u636e\u3001\u63d0\u4f9b\u5927\u91cf\u5b58\u50a8\u548c\u67e5\u8be2\u7684\u6570\u636e\u3001\u6709\u6548\u4fdd\u62a4\u6570\u636e\u548c\u5141\u8bb8\u591a\u7528\u6237\u8bbf\u95ee\u6570\u636e\u3002\u6570\u636e\u5e93\u7cfb\u7edf\u901a\u5e38\u5305\u62ec\u4e00\u4e2a\u7528\u4e8e\u7ba1\u7406\u6570\u636e\u7684\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf (DBMS)\u3002<\/p>\n<p>\u521b\u5efa\u81ea\u5df1\u7684\u6570\u636e\u5e93<\/p>\n<p>\u5bf9\u4e8e\u521d\u5b66\u8005\u6765\u8bf4\uff0c\u6211\u4eec\u9700\u8981\u4e86\u89e3\u51e0\u4e2a\u57fa\u672c\u6982\u5ff5\u5e76\u638c\u63e1\u4e00\u4e9b\u57fa\u672c\u6280\u5de7\u3002\u4e0b\u9762\uff0c\u6211\u4eec\u5c06\u8bb2\u8ff0\u5982\u4f55\u4f7f\u7528SQL\u8bed\u6cd5\u4e0e\u6570\u636e\u5e93\u7ba1\u7406\u8f6f\u4ef6\uff0c\u521b\u5efa\u81ea\u5df1\u7684\u6570\u636e\u5e93\u3002<\/p>\n<p>\u57fa\u672c\u6982\u5ff5<\/p>\n<p>1. \u6570\u636e\u5e93\u7684\u540d\u79f0\uff1a\u5728\u5f00\u59cb\u521b\u5efa\u6570\u636e\u5e93\u4e4b\u524d\uff0c\u9700\u8981\u5148\u8003\u8651\u6570\u636e\u5e93\u7684\u540d\u79f0\u3002\u6570\u636e\u5e93\u7684\u540d\u79f0\u5e94\u8be5\u5177\u6709\u8fa8\u8bc6\u5ea6\uff0c\u4ee5\u53ca\u6e05\u6670\u7b80\u6d01\u7684\u610f\u4e49\u3002<\/p>\n<p>2. \u6570\u636e\u5e93\u7684\u8868\uff1a\u6570\u636e\u5e93\u7684\u8868\u662f\u4e00\u79cd\u5173\u7cfb\uff0c\u5b83\u7531\u884c\u548c\u5217\u7ec4\u6210\u3002\u884c\u5305\u62ec\u6570\u636e\u884c\uff0c\u5217\u5305\u62ec\u6570\u636e\u5b57\u6bb5\u3002\u8868\u53ef\u4ee5\u7528\u6765\u5b58\u50a8\u3001\u7ec4\u7ec7\u548c\u7406\u89e3\u6570\u636e\u3002<\/p>\n<p>3. \u6570\u636e\u5e93\u7684\u5b57\u6bb5\uff1a\u5b57\u6bb5\u662f\u4e00\u4e2a\u8868\u6216\u8bb0\u5f55\u4e2d\u7684\u5355\u4e2a\u6570\u636e\u9879\u3002\u8868\u4e00\u822c\u6709\u591a\u4e2a\u5b57\u6bb5\uff0c\u6bcf\u4e2a\u5b57\u6bb5\u6709\u5176\u81ea\u5df1\u7684\u540d\u79f0\u548c\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<p>4. \u6570\u636e\u5e93\u7684\u6570\u636e\u7c7b\u578b\uff1a\u5728\u6267\u884c\u521b\u5efa\u8868\u7684\u64cd\u4f5c\u65f6\uff0c\u9700\u8981\u4e3a\u6bcf\u4e2a\u5b57\u6bb5\u6307\u5b9a\u4e00\u4e2a\u6570\u636e\u7c7b\u578b\u3002\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u901a\u5e38\u5305\u62ecVARCHAR\u3001INT\u3001FLOAT\u3001DATE\u7b49\u3002<\/p>\n<p>\u4e86\u89e3\u8fd9\u4e9b\u57fa\u672c\u6982\u5ff5\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5f00\u59cb\u521b\u5efa\u81ea\u5df1\u7684\u6570\u636e\u5e93\u4e86\u3002<\/p>\n<p>\u521b\u5efa\u6570\u636e\u5e93\u7684\u6b65\u9aa4<\/p>\n<p>1. \u5b89\u88c5\u6570\u636e\u5e93\u7ba1\u7406\u8f6f\u4ef6\uff1a\u5728\u521b\u5efa\u6570\u636e\u5e93\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5b89\u88c5\u6570\u636e\u5e93\u7ba1\u7406\u8f6f\u4ef6\uff0c\u5e38\u89c1\u7684\u6570\u636e\u5e93\u7ba1\u7406\u8f6f\u4ef6\u5305\u62ecMySQL\u3001Oracle\u7b49\u3002\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u9009\u62e9MySQL\u6570\u636e\u5e93\u4f5c\u4e3a\u4f8b\u5b50\u8fdb\u884c\u4ecb\u7ecd\u3002<\/p>\n<p>2. \u8fde\u63a5\u5230\u6570\u636e\u5e93\uff1a\u6253\u5f00MySQL\u6570\u636e\u5e93\u7ba1\u7406\u684c\u9762\u5ba2\u6237\u7aef\uff0c\u70b9\u51fb\u201c\u8fde\u63a5\u201d\u6309\u94ae\uff0c\u8f93\u5165MySQL\u670d\u52a1\u5668\u7684\u5730\u5740\u3001\u7aef\u53e3\u3001\u7528\u6237\u540d\u548c\u5bc6\u7801\u7b49\u4fe1\u606f\u8fdb\u884c\u8fde\u63a5\u3002<\/p>\n<p>3. \u521b\u5efa\u6570\u636e\u5e93\uff1a\u5b8c\u6210\u8fde\u63a5\u540e\uff0c\u8fdb\u5165MySQL\u6570\u636e\u5e93\u63a7\u5236\u53f0\uff0c\u4f7f\u7528SQL\u8bed\u53e5\u521b\u5efa\u6570\u636e\u5e93\u3002\u521b\u5efa\u6570\u636e\u5e93\u7684SQL\u8bed\u53e5\u5982\u4e0b\uff1a<\/p>\n<p>CREATE DATABASE database_name;<\/p>\n<p>4. \u521b\u5efa\u6570\u636e\u8868\uff1a\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u9700\u8981\u4f7f\u7528SQL\u8bed\u53e5\u521b\u5efa\u6570\u636e\u8868\uff0c\u4ee5\u5b58\u50a8\u6570\u636e\u3002\u521b\u5efa\u6570\u636e\u8868\u7684SQL\u8bed\u53e5\u5982\u4e0b\uff1a<\/p>\n<p>CREATE TABLE table_name (<\/p>\n<p>column1 datatype constrnts,<\/p>\n<p>column2 datatype constrnts,<\/p>\n<p>column3 datatype constrnts,<\/p>\n<p>\u2026<\/p>\n<p>5. \u63d2\u5165\u6570\u636e\uff1a\u5728\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u6570\u636e\u7684\u8868\u4e4b\u540e\uff0c\u6211\u4eec\u9700\u8981\u63d2\u5165\u6570\u636e\u3002\u63d2\u5165\u6570\u636e\u7684SQL\u8bed\u53e5\u5982\u4e0b\uff1a<\/p>\n<p>INSERT INTO table_name (column1, column2, column3, \u2026)<\/p>\n<p>VALUES (value1, value2, value3, \u2026);<\/p>\n<p>6. \u67e5\u8be2\u6570\u636e\uff1a\u5b8c\u6210\u6570\u636e\u63d2\u5165\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u67e5\u8be2\u8bed\u53e5\u6765\u67e5\u770b\u6570\u636e\u3002\u67e5\u8be2\u6570\u636e\u7684SQL\u8bed\u53e5\u5982\u4e0b\uff1a<\/p>\n<p>SELECT column1, column2, column3, \u2026<\/p>\n<p>FROM table_name<\/p>\n<p>WHERE condition ;<\/p>\n<p>\u8fd9\u4e9b\u5c31\u662f\u521b\u5efa\u81ea\u5df1\u7684\u6570\u636e\u5e93\u9700\u8981\u638c\u63e1\u7684\u57fa\u672c\u6982\u5ff5\u548c\u5177\u4f53\u6b65\u9aa4\u3002\u9488\u5bf9\u4e0d\u540c\u7684\u6570\u636e\u5e93\u7ba1\u7406\u8f6f\u4ef6\uff0c\u53ef\u80fd\u4f1a\u6709\u4e00\u4e9b\u8bed\u6cd5\u4e0a\u7684\u5dee\u5f02\uff0c\u9700\u8981\u9488\u5bf9\u5177\u4f53\u7684\u8f6f\u4ef6\u6765\u5b66\u4e60\u548c\u638c\u63e1\u8fd9\u4e9b\u8bed\u6cd5\u3002<\/p>\n<p>\u6570\u636e\u5e93\u662f\u8ba1\u7b97\u673a\u79d1\u5b66\u9886\u57df\u6700\u4e3a\u57fa\u7840\u548c\u5173\u952e\u7684\u8981\u7d20\u4e4b\u4e00\u3002\u672c\u6587\u4ece\u6570\u636e\u5e93\u7684\u57fa\u672c\u6982\u5ff5\u51fa\u53d1\uff0c\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528SQL\u8bed\u6cd5\u4e0e\u6570\u636e\u5e93\u7ba1\u7406\u8f6f\u4ef6\uff0c\u521b\u5efa\u81ea\u5df1\u7684\u6570\u636e\u5e93\u3002\u8fd9\u5bf9\u4e8e\u521d\u5b66\u8005\u800c\u8a00\u975e\u5e38\u91cd\u8981\u3002\u6240\u4ee5\uff0c\u53ea\u6709\u9010\u6b65\u63d0\u9ad8\u81ea\u5df1\u7684\u6570\u636e\u5e93\u6280\u80fd\uff0c\u624d\u80fd\u66f4\u597d\u5730\u5728\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u5e94\u7528\u5b83\uff0c\u53d1\u6325\u66f4\u5927\u7684\u6548\u7528\u3002<\/p>\n<p><strong>\u76f8\u5173\u95ee\u9898\u62d3\u5c55\u9605\u8bfb\uff1a<\/strong><\/p>\n<ul>\n<li>\u5982\u4f55\u7528sql\u5efa\u7acb\u6570\u636e\u5e93<\/li>\n<\/ul>\n<h3>\u5982\u4f55\u7528sql\u5efa\u7acb\u6570\u636e\u5e93<\/h3>\n<p>\u5728 MySQL \u4e2d\uff0c\u53ef\u4ed4\u9646\u4ee5\u4f7f\u7528 CREATE DATABASE \u8bed\u53e5\u521b\u5efa\u6570\u636e\u5e93\uff0c\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1aCREATE DATABASE CHARACTER SET &gt;&nbsp; COLLATE &gt;;<\/p>\n<\/p>\n<p>\u4e2d\u7684\u5185\u5bb9\u662f\u53ef\u9009\u7684\u3002\u8bed\u6cd5\u8bf4\u660e\u5982\u4e0b\uff1a<\/p>\n<p>\uff1a\u521b\u5efa\u6570\u636e\u5e93\u7684\u540d\u79f0\u3002MySQL \u7684\u6570\u636e\u5b58\u50a8\u533a\u5c06\u4ee5\u76ee\u5f55\u65b9\u5f0f\u8868\u793a MySQL \u6570\u636e\u5e93\uff0c\u56e0\u6b64\u6570\u636e\u5e93\u540d\u79f0\u5fc5\u987b\u7b26\u5408\u64cd\u4f5c\u7cfb\u7edf\u7684\u6587\u4ef6\u5939\u547d\u8ba9\u621a\u69d0\u540d\u89c4\u5219\uff0c\u4e0d\u80fd\u4ee5\u6570\u5b57\u5f00\u5934\uff0c\u5c3d\u91cf\u8981\u6709\u5b9e\u9645\u610f\u4e49\u3002\u6ce8\u610f\u5728 MySQL \u4e2d\u4e0d\u533a\u5206\u5927\u5c0f\u5199\u3002<\/p>\n<p>IF NOT EXISTS\uff1a\u5728\u521b\u5efa\u6570\u636e\u5e93\u4e4b\u524d\u8fdb\u884c\u5224\u65ad\uff0c\u53ea\u6709\u8be5\u6570\u636e\u5e93\u76ee\u524d\u5c1a\u4e0d\u5b58\u5728\u65f6\u624d\u80fd\u6267\u884c\u64cd\u4f5c\u3002\u6b64\u9009\u9879\u53ef\u4ee5\u7528\u6765\u907f\u514d\u6570\u636e\u5e93\u5df2\u7ecf\u5b58\u5728\u800c\u91cd\u590d\u521b\u5efa\u7684\u9519\u8bef\u3002<\/p>\n<p> CHARACTER SET\uff1a\u6307\u5b9a\u6570\u636e\u5e93\u7684\u5b57\u7b26\u96c6\u3002\u6307\u5b9a\u5b57\u7b26\u96c6\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u907f\u514d\u5728\u6570\u636e\u5e93\u4e2d\u5b58\u50a8\u7684\u6570\u636e\u51fa\u73b0\u4e71\u7801\u7684\u60c5\u51b5\u3002\u5982\u679c\u5728\u521b\u5efa\u6570\u636e\u5e93\u65f6\u4e0d\u6307\u5b9a\u5b57\u7b26\u96c6\uff0c\u90a3\u4e48\u5c31\u4f7f\u7528\u7cfb\u7edf\u7684\u9ed8\u8ba4\u5b57\u7b26\u96c6\u3002<\/p>\n<\/p>\n<p> 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