{"id":310758,"date":"2024-05-20T21:57:59","date_gmt":"2024-05-20T13:57:59","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/310758.html"},"modified":"2024-05-20T21:58:08","modified_gmt":"2024-05-20T13:58:08","slug":"mysql-%e7%9a%84-help-%e5%91%bd%e4%bb%a4%e5%ba%94%e8%af%a5%e6%80%8e%e4%b9%88%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/310758.html","title":{"rendered":"MySQL \u7684 help \u547d\u4ee4\u5e94\u8be5\u600e\u4e48\u4f7f\u7528"},"content":{"rendered":"

\"MySQL<\/p>\n

MySQL\u7684help<\/code>\u547d\u4ee4\u662f\u7528\u4e8e\u83b7\u53d6MySQL\u547d\u4ee4\u884c\u5de5\u5177\u4e2d\u7684\u547d\u4ee4\u5e2e\u52a9\u4fe1\u606f\uff0c\u5b83\u652f\u6301\u67e5\u627e\u7279\u5b9aSQL\u8bed\u53e5\u3001\u7cfb\u7edf\u53d8\u91cf\u4ee5\u53ca\u547d\u4ee4\u7684\u4f7f\u7528\u65b9\u6cd5\u548c\u53c2\u6570\u7b49\u3002\u8981\u6709\u6548\u4f7f\u7528help<\/code>\u547d\u4ee4\uff0c\u7528\u6237\u9700\u8981\u4e86\u89e3\u5176\u57fa\u7840\u8bed\u6cd5\u3001\u5e38\u89c1\u7528\u6cd5\u3001\u5404\u79cd\u53c2\u6570\u7684\u4f5c\u7528\u3001\u4ee5\u53ca\u5982\u4f55\u901a\u8fc7\u5b83\u6df1\u5165\u63a2\u7d22MySQL\u7684\u529f\u80fd\u3002\u6838\u5fc3\u89c2\u70b9<\/strong>\u5305\u62ec\u4e86\u89e3help<\/code>\u547d\u4ee4\u7684\u57fa\u672c\u8bed\u6cd5\u3001\u5b66\u4f1a\u4f7f\u7528help<\/code>\u547d\u4ee4\u67e5\u627e\u7279\u5b9a\u4fe1\u606f\u3001\u638c\u63e1\u901a\u8fc7help<\/code>\u547d\u4ee4\u6df1\u5165\u4e86\u89e3MySQL\u529f\u80fd\u7684\u6280\u5de7<\/strong>\u3002\u5728\u8fd9\u4e9b\u89c2\u70b9\u4e2d\uff0c\u4e86\u89e3help<\/code>\u547d\u4ee4\u7684\u57fa\u672c\u8bed\u6cd5<\/strong>\u662f\u975e\u5e38\u5173\u952e\u7684\uff0c\u56e0\u4e3a\u5b83\u662f\u4f7f\u7528help<\/code>\u547d\u4ee4\u7684\u57fa\u7840\u3002help<\/code>\u547d\u4ee4\u7684\u57fa\u672c\u4f7f\u7528\u683c\u5f0f\u662fHELP 'search_string'<\/code>\uff0c\u5176\u4e2d'search_string'<\/code>\u53ef\u4ee5\u662fSQL\u8bed\u53e5\u7684\u5173\u952e\u5b57\u3001\u547d\u4ee4\u540d\u79f0\u6216\u8005\u662f\u7cfb\u7edf\u53d8\u91cf\u7b49\u3002\u901a\u8fc7\u8f93\u5165HELP 'keyword'<\/code>\uff0c\u7528\u6237\u53ef\u4ee5\u83b7\u53d6\u5230\u5173\u4e8e\u8be5\u5173\u952e\u5b57\u7684\u8be6\u7ec6\u5e2e\u52a9\u4fe1\u606f\uff0c\u8fd9\u5bf9\u4e8e\u521d\u5b66\u8005\u6765\u8bf4\u662f\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684\u529f\u80fd\uff0c\u80fd\u591f\u5728\u5b9e\u8df5\u4e2d\u8fc5\u901f\u67e5\u627e\u548c\u5b66\u4e60\u672a\u77e5\u547d\u4ee4\u7684\u7528\u6cd5\u548c\u53c2\u6570\u3002<\/p>\n<\/p>\n

\u4e00\u3001MYSQL HELP\u547d\u4ee4\u7684\u57fa\u672c\u8bed\u6cd5<\/h3>\n<\/p>\n

MySQL\u7684help<\/code>\u547d\u4ee4\u63d0\u4f9b\u4e86\u4e00\u4e2a\u76f4\u89c2\u7684\u65b9\u5f0f\u6765\u67e5\u8be2\u5173\u4e8eMySQL\u547d\u4ee4\u3001\u8bed\u6cd5\u3001\u51fd\u6570\u53ca\u5176\u5b83\u5173\u952e\u8bcd\u7684\u5e2e\u52a9\u4fe1\u606f\u3002\u8981\u5f00\u59cb\u4f7f\u7528\uff0c\u60a8\u53ea\u9700\u8981\u77e5\u9053\u57fa\u7840\u7684\u8f93\u5165\u683c\u5f0f\u3002<\/p>\n<\/p>\n

    \n
  • \u7b2c\u4e00\u4e2a\u6b65\u9aa4\u662f\u6253\u5f00MySQL\u547d\u4ee4\u884c\u5de5\u5177\u5e76\u767b\u5f55\u5230\u60a8\u7684MySQL\u670d\u52a1\u5668\u3002<\/li>\n
  • \u7136\u540e\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u952e\u5165HELP<\/code>\u6216\u8005?<\/code>\u52a0\u4e0a\u6240\u9700\u67e5\u8be2\u7684\u9879\uff08\u5982\u547d\u4ee4\u3001\u51fd\u6570\u540d\u3001\u5173\u952e\u8bcd\u7b49\uff09\u6765\u4f7f\u7528help<\/code>\u547d\u4ee4\u3002\u4f8b\u5982\uff0cHELP 'SELECT';<\/code> \u6216\u8005 ? SELECT;<\/code>\u3002<\/li>\n<\/ul>\n

    \u8fd9\u4e2a\u547d\u4ee4\u80fd\u591f\u4e3a\u7528\u6237\u63d0\u4f9b\u5173\u4e8eSELECT\u8bed\u53e5\u7684\u4f7f\u7528\u65b9\u6cd5\u3001\u8bed\u6cd5\u3001\u9009\u9879\u7b49\u8be6\u7ec6\u4fe1\u606f\u3002\u521d\u5b66\u8005\u53ef\u4ee5\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\u5feb\u901f\u638c\u63e1\u57fa\u7840\u547d\u4ee4\u7684\u4f7f\u7528\u3002<\/p>\n<\/p>\n

    \u4e8c\u3001\u4f7f\u7528HELP\u547d\u4ee4\u67e5\u627e\u7279\u5b9a\u4fe1\u606f<\/h3>\n<\/p>\n

    MySQL\u7684help<\/code>\u547d\u4ee4\u9664\u4e86\u80fd\u591f\u63d0\u4f9b\u5173\u4e8eSQL\u8bed\u53e5\u7684\u5e2e\u52a9\u4fe1\u606f\u5916\uff0c\u8fd8\u80fd\u7528\u6765\u67e5\u8be2\u7cfb\u7edf\u53d8\u91cf\u3001\u51fd\u6570\u3001\u64cd\u4f5c\u7b26\u7b49\u7684\u8be6\u7ec6\u8bf4\u660e\u3002<\/p>\n<\/p>\n

    \u67e5\u627eSQL\u8bed\u53e5\u7684\u5e2e\u52a9\u4fe1\u606f<\/h4>\n<\/p>\n

    \u8981\u83b7\u53d6\u7279\u5b9aSQL\u8bed\u53e5\u7684\u5e2e\u52a9\u4fe1\u606f\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528SQL\u8bed\u53e5\u7684\u5173\u952e\u5b57\u4f5c\u4e3a\u641c\u7d22\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\u8981\u67e5\u627e\u6709\u5173JOIN<\/code>\u64cd\u4f5c\u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u8f93\u5165HELP 'JOIN';<\/code>\u3002<\/p>\n<\/p>\n

    \u67e5\u8be2\u7cfb\u7edf\u53d8\u91cf\u548c\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5<\/h4>\n<\/p>\n

    \u7cfb\u7edf\u53d8\u91cf\u548c\u5185\u7f6e\u51fd\u6570\u4e5f\u662fMySQL\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u7ec4\u6210\u90e8\u5206\u3002\u8981\u67e5\u8be2\u8fd9\u4e9b\u5143\u7d20\u7684\u5e2e\u52a9\u4fe1\u606f\uff0c\u540c\u6837\u53ef\u4ee5\u4f7f\u7528help<\/code>\u547d\u4ee4\u3002\u4f8b\u5982\uff0c\u8f93\u5165HELP 'max_connections';<\/code>\u53ef\u4ee5\u67e5\u8be2\u6700\u5927\u8fde\u63a5\u6570\u53d8\u91cf\u7684\u76f8\u5173\u4fe1\u606f\u3002<\/p>\n<\/p>\n

    \u4e09\u3001\u638c\u63e1\u901a\u8fc7HELP\u547d\u4ee4\u6df1\u5165\u4e86\u89e3MySQL\u529f\u80fd\u7684\u6280\u5de7<\/h3>\n<\/p>\n

    \u901a\u8fc7help<\/code>\u547d\u4ee4\u4e0d\u4ec5\u53ef\u4ee5\u83b7\u53d6\u5230\u547d\u4ee4\u7684\u8bed\u6cd5\u548c\u53c2\u6570\u8bf4\u660e\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u5b83\u6765\u63a2\u7d22MySQL\u63d0\u4f9b\u7684\u9ad8\u7ea7\u529f\u80fd\u548c\u8bdd\u9898\u3002<\/p>\n<\/p>\n

    \u5229\u7528\u5206\u7c7b\u67e5\u627e\u63d0\u9ad8\u6548\u7387<\/h4>\n<\/p>\n

    MySQL\u7684help<\/code>\u547d\u4ee4\u652f\u6301\u901a\u8fc7\u7c7b\u522b\u67e5\u627e\u5e2e\u52a9\u4e3b\u9898\uff0c\u8fd9\u53ef\u4ee5\u8ba9\u7528\u6237\u66f4\u52a0\u9ad8\u6548\u5730\u627e\u5230\u6240\u9700\u7684\u4fe1\u606f\u3002\u4f8b\u5982\uff0cHELP 'Contents';<\/code>\u547d\u4ee4\u53ef\u4ee5\u663e\u793a\u6240\u6709\u53ef\u7528\u7684\u5e2e\u52a9\u7c7b\u522b\u3002<\/p>\n<\/p>\n

    \u7cfb\u7edf\u6027\u5b66\u4e60\u7684\u9014\u5f84<\/h4>\n<\/p>\n

    HELP<\/code>\u547d\u4ee4\u8fd8\u53ef\u4ee5\u4f5c\u4e3a\u7cfb\u7edf\u5b66\u4e60MySQL\u7684\u4e00\u4e2a\u9014\u5f84\u3002\u901a\u8fc7\u9010\u4e00\u67e5\u8be2HELP<\/code>\u547d\u4ee4\u5217\u51fa\u7684\u9ad8\u7ea7\u4e3b\u9898\uff0c\u7528\u6237\u53ef\u4ee5\u9010\u6b65\u6df1\u5165\u4e86\u89e3MySQL\u7684\u5404\u4e2a\u65b9\u9762\u3002<\/p>\n<\/p>\n

    \u56db\u3001\u6848\u4f8b\u53ca\u5b9e\u8df5<\/h3>\n<\/p>\n

    \u5b9e\u8df5\u662f\u68c0\u9a8c\u7406\u8bba\u7684\u552f\u4e00\u6807\u51c6\uff0c\u901a\u8fc7\u94bb\u7814\u5177\u4f53\u7684\u6848\u4f8b\uff0c\u53ef\u4ee5\u66f4\u5feb\u5730\u638c\u63e1help<\/code>\u547d\u4ee4\u7684\u5b9e\u9645\u5e94\u7528\u3002<\/p>\n<\/p>\n

    \u793a\u4f8b\u6848\u4f8b\u5206\u6790<\/h4>\n<\/p>\n

    \u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u5b9e\u9645\u7684\u6570\u636e\u5e93\u95ee\u9898\uff0c\u5e76\u5c1d\u8bd5\u7528HELP<\/code>\u547d\u4ee4\u67e5\u627e\u89e3\u51b3\u65b9\u6848\u3002\u8fd9\u4e0d\u4ec5\u80fd\u52a0\u6df1\u5bf9HELP<\/code>\u547d\u4ee4\u7528\u6cd5\u7684\u7406\u89e3\uff0c\u8fd8\u80fd\u589e\u5f3a\u89e3\u51b3\u5b9e\u9645\u95ee\u9898\u7684\u80fd\u529b\u3002<\/p>\n<\/p>\n

    \u5b9e\u6218\u6f14\u7ec3<\/h4>\n<\/p>\n

    \u5b9a\u671f\u8fdb\u884cMySQL\u77e5\u8bc6\u7684\u5c0f\u6d4b\u8bd5\uff0c\u6bd4\u5982\u6311\u9009\u51e0\u4e2a\u672a\u77e5\u7684SQL\u547d\u4ee4\u6216\u51fd\u6570\uff0c\u5c1d\u8bd5\u4f7f\u7528HELP<\/code>\u547d\u4ee4\u67e5\u8be2\u5176\u7528\u6cd5\uff0c\u5e76\u5728\u5b9e\u9645\u7684\u6570\u636e\u5e93\u64cd\u4f5c\u4e2d\u5e94\u7528\u5b83\u4eec\u3002<\/p>\n<\/p>\n

    \u901a\u8fc7\u6df1\u5165\u7406\u89e3\u548c\u79ef\u6781\u8fd0\u7528MySQL\u7684help<\/code>\u547d\u4ee4\uff0c\u7528\u6237\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u81ea\u5df1\u89e3\u51b3\u95ee\u9898\u548c\u5b66\u4e60\u65b0\u77e5\u8bc6\u7684\u80fd\u529b\uff0c\u4ece\u800c\u5728\u6570\u636e\u5e93\u7ba1\u7406\u548c\u64cd\u4f5c\u4e0a\u53d8\u5f97\u66f4\u52a0\u5f97\u5fc3\u5e94\u624b\u3002<\/p>\n<\/p>\n

    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

    1. \u5982\u4f55\u5728MySQL\u4e2d\u4f7f\u7528HELP\u547d\u4ee4\u6765\u83b7\u5f97\u5e2e\u52a9\uff1f<\/strong>
    \n\u5728MySQL\u4e2d\uff0c\u8981\u4f7f\u7528HELP\u547d\u4ee4\u6765\u83b7\u53d6\u5e2e\u52a9\uff0c\u53ea\u9700\u5728\u547d\u4ee4\u884c\u4e2d\u8f93\u5165"HELP"\uff0c\u7136\u540e\u6309\u4e0b\u56de\u8f66\u5373\u53ef\u3002MySQL\u4f1a\u663e\u793a\u4e00\u4e2a\u5e2e\u52a9\u83dc\u5355\uff0c\u5217\u51fa\u4e86\u5404\u79cd\u547d\u4ee4\u548c\u7528\u6cd5\u7684\u7b80\u8981\u8bf4\u660e\u3002\u60a8\u53ef\u4ee5\u6d4f\u89c8\u5e76\u627e\u5230\u60a8\u611f\u5174\u8da3\u7684\u4e3b\u9898\uff0c\u7136\u540e\u67e5\u770b\u8be6\u7ec6\u7684\u547d\u4ee4\u8bf4\u660e\u548c\u793a\u4f8b\u3002<\/p>\n

    2. HELP\u547d\u4ee4\u7684\u5e38\u89c1\u7528\u9014\u6709\u54ea\u4e9b\uff1f<\/strong>
    \nHELP\u547d\u4ee4\u662fMySQL\u4e2d\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u5e2e\u52a9\u60a8\u4e86\u89e3\u548c\u5b66\u4e60MySQL\u7684\u5404\u79cd\u529f\u80fd\u548c\u547d\u4ee4\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528HELP\u547d\u4ee4\u6765\u4e86\u89e3\u7279\u5b9a\u547d\u4ee4\u7684\u8bed\u6cd5\u548c\u9009\u9879\uff0c\u67e5\u627e\u7279\u5b9a\u529f\u80fd\u7684\u7528\u6cd5\u793a\u4f8b\uff0c\u751a\u81f3\u63a2\u7d22\u7279\u5b9a\u4e3b\u9898\u7684\u66f4\u6df1\u5c42\u6b21\u7684\u4fe1\u606f\u3002\u65e0\u8bba\u662f\u65b0\u624b\u8fd8\u662f\u6709\u7ecf\u9a8c\u7684\u7528\u6237\uff0cHELP\u547d\u4ee4\u90fd\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u53c2\u8003\u5de5\u5177\uff0c\u7528\u6765\u56de\u7b54\u5173\u4e8eMySQL\u4f7f\u7528\u65b9\u9762\u7684\u5e38\u89c1\u95ee\u9898\u3002<\/p>\n

    3. \u5982\u4f55\u5728MySQL\u7684HELP\u547d\u4ee4\u4e2d\u8fdb\u884c\u5173\u952e\u8bcd\u641c\u7d22\uff1f<\/strong>
    \n\u5982\u679c\u60a8\u60f3\u8981\u5728MySQL\u7684HELP\u547d\u4ee4\u4e2d\u641c\u7d22\u7279\u5b9a\u7684\u5173\u952e\u8bcd\u6216\u4e3b\u9898\uff0c\u53ef\u4ee5\u5728HELP\u547d\u4ee4\u540e\u9762\u7684\u547d\u4ee4\u4e2d\u4f7f\u7528\u5173\u952e\u8bcd\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u60f3\u8981\u4e86\u89e3\u5173\u4e8e"SELECT"\u8bed\u53e5\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u60a8\u53ef\u4ee5\u952e\u5165"HELP SELECT"\u6765\u83b7\u53d6\u4e0eSELECT\u8bed\u53e5\u76f8\u5173\u7684\u5e2e\u52a9\u4fe1\u606f\u3002MySQL\u5c06\u663e\u793a\u4e0e\u8be5\u5173\u952e\u8bcd\u76f8\u5173\u7684\u6240\u6709\u547d\u4ee4\u548c\u4e3b\u9898\uff0c\u4ee5\u5e2e\u52a9\u60a8\u627e\u5230\u6240\u9700\u7684\u4fe1\u606f\u3002\u8fd9\u4e00\u641c\u7d22\u529f\u80fd\u53ef\u4ee5\u5e2e\u52a9\u60a8\u66f4\u5feb\u5730\u627e\u5230\u4e0e\u60a8\u7684\u95ee\u9898\u6216\u5174\u8da3\u76f8\u5173\u7684\u547d\u4ee4\u548c\u4e3b\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"MySQL\u7684help\u547d\u4ee4\u662f\u7528\u4e8e\u83b7\u53d6MySQL\u547d\u4ee4\u884c\u5de5\u5177\u4e2d\u7684\u547d\u4ee4\u5e2e\u52a9\u4fe1\u606f\uff0c\u5b83\u652f\u6301\u67e5\u627e\u7279\u5b9aSQL\u8bed\u53e5\u3001\u7cfb\u7edf\u53d8\u91cf\u4ee5\u53ca […]","protected":false},"author":3,"featured_media":310768,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/310758"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=310758"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/310758\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/310768"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=310758"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=310758"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=310758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}