{"id":179944,"date":"2024-11-09T06:06:19","date_gmt":"2024-11-08T22:06:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179944\/"},"modified":"2024-11-09T06:06:20","modified_gmt":"2024-11-08T22:06:20","slug":"%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a2%ba%e7%b7%a8%e5%af%ab%e9%ab%98%e8%b3%aa%e9%87%8f%e9%ab%98%e6%80%a7%e8%83%bd%e7%9a%84-mysql-%e8%aa%9e%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179944\/","title":{"rendered":"\u5982\u4f55\u6b63\u78ba\u7de8\u5beb\u9ad8\u8cea\u91cf\u9ad8\u6027\u80fd\u7684 MySQL \u8a9e\u6cd5"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a2%ba%e7%b7%a8%e5%af%ab%e9%ab%98%e8%b3%aa%e9%87%8f%e9%ab%98%e6%80%a7%e8%83%bd%e7%9a%84-mysql-%e8%aa%9e%e6%b3%95-EektuKGdst\">\u5982\u4f55\u6b63\u78ba\u7de8\u5beb\u9ad8\u8cea\u91cf\u9ad8\u6027\u80fd\u7684 MySQL \u8a9e\u6cd5<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0cMySQL \u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u7db2\u7ad9\u9084\u662f\u5927\u578b\u4f01\u696d\u7cfb\u7d71\uff0c\u6b63\u78ba\u7de8\u5beb\u9ad8\u8cea\u91cf\u3001\u9ad8\u6027\u80fd\u7684 MySQL \u8a9e\u6cd5\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u512a\u5316\u5176 MySQL \u67e5\u8a62\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n<h2 id=\"1-%e4%bd%bf%e7%94%a8%e9%81%a9%e7%95%b6%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-EektuKGdst\">1. \u4f7f\u7528\u9069\u7576\u7684\u6578\u64da\u985e\u578b<\/h2>\n<p>\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u5c0d\u65bc\u6578\u64da\u5eab\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u4f7f\u7528\u904e\u5927\u7684\u6578\u64da\u985e\u578b\u6703\u6d6a\u8cbb\u5b58\u5132\u7a7a\u9593\uff0c\u4e26\u5f71\u97ff\u67e5\u8a62\u901f\u5ea6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u6578\u64da\u985e\u578b\u53ca\u5176\u5efa\u8b70\u7528\u6cd5\uff1a<\/p>\n<ul>\n<li><code>INT<\/code>\uff1a\u7528\u65bc\u6574\u6578\uff0c\u901a\u5e38\u4f7f\u7528 <code>TINYINT<\/code>\u3001<code>SMALLINT<\/code>\u3001<code>MEDIUMINT<\/code> \u6216 <code>BIGINT<\/code> \u4f86\u6839\u64da\u9700\u8981\u9078\u64c7\u5408\u9069\u7684\u5927\u5c0f\u3002<\/li>\n<li><code>VARCHAR<\/code>\uff1a\u7528\u65bc\u53ef\u8b8a\u9577\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u61c9\u6839\u64da\u5be6\u969b\u9700\u8981\u8a2d\u7f6e\u6700\u5927\u9577\u5ea6\u3002<\/li>\n<li><code>DATE<\/code> \u548c <code>DATETIME<\/code>\uff1a\u7528\u65bc\u65e5\u671f\u548c\u6642\u9593\uff0c\u9078\u64c7\u5408\u9069\u7684\u985e\u578b\u4ee5\u7bc0\u7701\u7a7a\u9593\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95%e4%be%86%e5%8a%a0%e9%80%9f%e6%9f%a5%e8%a9%a2-EektuKGdst\">2. \u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62<\/h2>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u6709\u6548\u5de5\u5177\u3002\u901a\u904e\u5728\u8868\u7684\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u6240\u9700\u7684\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u7d22\u5f15\u7684\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li>\u5c0d\u65bc\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u5217\uff08\u5982 <code>WHERE<\/code> \u5b50\u53e5\u4e2d\u7684\u5217\uff09\uff0c\u61c9\u8003\u616e\u5275\u5efa\u7d22\u5f15\u3002<\/li>\n<li>\u907f\u514d\u5728\u4f4e\u57fa\u6578\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u56e0\u70ba\u9019\u6a23\u7684\u7d22\u5f15\u53ef\u80fd\u4e0d\u6703\u5e36\u4f86\u6027\u80fd\u63d0\u5347\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u7dad\u8b77\u7d22\u5f15\uff0c\u522a\u9664\u4e0d\u518d\u4f7f\u7528\u7684\u7d22\u5f15\u4ee5\u7bc0\u7701\u8cc7\u6e90\u3002<\/li>\n<\/ul>\n<h2 id=\"3-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e8%aa%9e%e6%b3%95-EektuKGdst\">3. \u512a\u5316\u67e5\u8a62\u8a9e\u6cd5<\/h2>\n<p>\u7de8\u5beb\u9ad8\u6548\u7684\u67e5\u8a62\u8a9e\u6cd5\u662f\u63d0\u5347 MySQL \u6027\u80fd\u7684\u95dc\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u67e5\u8a62\u7684\u6280\u5de7\uff1a<\/p>\n<ul>\n<li>\u907f\u514d\u4f7f\u7528 <code>SELECT *<\/code>\uff0c\u800c\u662f\u660e\u78ba\u6307\u5b9a\u6240\u9700\u7684\u5217\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u91cf\u3002<\/li>\n<li>\u4f7f\u7528 <code>JOIN<\/code> \u800c\u4e0d\u662f\u5b50\u67e5\u8a62\uff0c\u56e0\u70ba <code>JOIN<\/code> \u901a\u5e38\u6027\u80fd\u66f4\u597d\u3002<\/li>\n<li>\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528 <code>LIMIT<\/code> \u9650\u5236\u8fd4\u56de\u7684\u884c\u6578\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"4-%e4%bd%bf%e7%94%a8%e4%ba%8b%e5%8b%99%e4%be%86%e4%bf%9d%e8%ad%89%e6%95%b8%e6%93%9a%e4%b8%80%e8%87%b4%e6%80%a7-EektuKGdst\">4. \u4f7f\u7528\u4e8b\u52d9\u4f86\u4fdd\u8b49\u6578\u64da\u4e00\u81f4\u6027<\/h2>\n<p>\u5728\u9032\u884c\u591a\u500b\u6578\u64da\u64cd\u4f5c\u6642\uff0c\u4f7f\u7528\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u4e8b\u52d9\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>START TRANSACTION;\n-- \u57f7\u884c\u591a\u500b\u6578\u64da\u64cd\u4f5c\nCOMMIT; -- \u63d0\u4ea4\u4e8b\u52d9\n<\/code><\/pre>\n<p>\u5982\u679c\u5728\u4e8b\u52d9\u4e2d\u51fa\u73fe\u932f\u8aa4\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>ROLLBACK<\/code> \u4f86\u64a4\u92b7\u6240\u6709\u64cd\u4f5c\uff0c\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"5-%e5%ae%9a%e6%9c%9f%e9%80%b2%e8%a1%8c%e6%80%a7%e8%83%bd%e7%9b%a3%e6%8e%a7%e5%92%8c%e8%aa%bf%e6%95%b4-EektuKGdst\">5. \u5b9a\u671f\u9032\u884c\u6027\u80fd\u76e3\u63a7\u548c\u8abf\u6574<\/h2>\n<p>\u5b9a\u671f\u76e3\u63a7\u6578\u64da\u5eab\u6027\u80fd\u662f\u78ba\u4fdd\u5176\u9ad8\u6548\u904b\u884c\u7684\u5fc5\u8981\u6b65\u9a5f\u3002\u53ef\u4ee5\u4f7f\u7528 MySQL \u7684\u6027\u80fd\u76e3\u63a7\u5de5\u5177\uff0c\u5982 <code>EXPLAIN<\/code> \u8a9e\u53e5\u4f86\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u627e\u51fa\u6027\u80fd\u74f6\u9838\u3002\u6839\u64da\u76e3\u63a7\u7d50\u679c\uff0c\u8abf\u6574\u7d22\u5f15\u3001\u67e5\u8a62\u548c\u6578\u64da\u7d50\u69cb\uff0c\u4ee5\u6301\u7e8c\u512a\u5316\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-EektuKGdst\">\u7e3d\u7d50<\/h2>\n<p>\u7de8\u5beb\u9ad8\u8cea\u91cf\u3001\u9ad8\u6027\u80fd\u7684 MySQL \u8a9e\u6cd5\u9700\u8981\u8003\u616e\u591a\u65b9\u9762\u7684\u56e0\u7d20\uff0c\u5305\u62ec\u6578\u64da\u985e\u578b\u7684\u9078\u64c7\u3001\u7d22\u5f15\u7684\u4f7f\u7528\u3001\u67e5\u8a62\u7684\u512a\u5316\u3001\u4e8b\u52d9\u7684\u7ba1\u7406\u4ee5\u53ca\u6027\u80fd\u7684\u76e3\u63a7\u3002\u901a\u904e\u9075\u5faa\u9019\u4e9b\u6700\u4f73\u5be6\u8e10\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u986f\u8457\u63d0\u5347\u5176\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u6548\u7387\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u74b0\u5883\u4e2d\u512a\u5316 MySQL \u6578\u64da\u5eab\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u6b63\u78ba\u7de8\u5beb\u9ad8\u8cea\u91cf\u3001\u9ad8\u6027\u80fd\u7684 MySQL \u8a9e\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6548\u7387\uff0c\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff0c\u5be6\u73fe\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-179944","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179944","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=179944"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179944\/revisions"}],"predecessor-version":[{"id":179945,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179944\/revisions\/179945"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}