{"id":33817,"date":"2024-11-25T15:26:11","date_gmt":"2024-11-25T07:26:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/33817\/"},"modified":"2024-11-25T15:26:11","modified_gmt":"2024-11-25T07:26:11","slug":"%e5%b8%9d%e5%9b%bdcms%e6%95%b0%e6%8d%ae%e8%a1%a8%e4%b8%a4%e4%b8%aa%e5%85%b3%e8%81%94%e5%ad%97%e6%ae%b5%e6%9f%a5%e8%af%a2%e4%b8%8d%e4%b8%80%e8%87%b4%e6%80%8e%e4%b9%88%e5%8a%9e","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/33817\/","title":{"rendered":"\u5e1d\u56fdcms\u6570\u636e\u8868\u4e24\u4e2a\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u600e\u4e48\u529e"},"content":{"rendered":"<blockquote><p>\n  \u5e1d\u56fdcms \u6570\u636e\u8868\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u7684\u89e3\u51b3\u65b9\u6cd5\uff1a1. \u68c0\u67e5\u6570\u636e\u8868\u7ed3\u6784\uff0c\u786e\u4fdd\u5173\u8054\u5b57\u6bb5\u5b58\u5728\u4e14\u4e00\u81f4\uff1b2. \u4fee\u590d\u6570\u636e\u9519\u8bef\uff0c\u66f4\u6b63\u7a7a\u503c\u6216\u4e0d\u4e00\u81f4\u7684\u6570\u636e\uff1b3. \u4f7f\u7528 left join \u67e5\u8be2\uff0c\u5ffd\u7565\u4e0d\u4e00\u81f4\u884c\uff1b4. \u4f18\u5316\u67e5\u8be2\uff0c\u521b\u5efa\u7d22\u5f15\u5e76\u9650\u5236\u8fd4\u56de\u5217\u6570\uff1b5. \u6392\u9664\u4e0d\u4e00\u81f4\u6570\u636e\uff0c\u4ece\u67e5\u8be2\u7ed3\u679c\u4e2d\u5254\u9664\u95ee\u9898\u884c\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202404\/16\/2024041620573164191.jpg\" class=\"aligncenter\" title=\"\u5e1d\u56fdcms\u6570\u636e\u8868\u4e24\u4e2a\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u600e\u4e48\u529e\u63d2\u56fe\" alt=\"\u5e1d\u56fdcms\u6570\u636e\u8868\u4e24\u4e2a\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u600e\u4e48\u529e\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5e1d\u56fdCMS \u6570\u636e\u8868\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u7684\u89e3\u51b3\u65b9\u6cd5<\/strong><\/p>\n<p><strong>\u95ee\u9898\uff1a<\/strong>\u5e1d\u56fdCMS \u6570\u636e\u8868\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u600e\u4e48\u529e\uff1f<\/p>\n<p><strong>\u56de\u7b54\uff1a<\/strong>\u51fa\u73b0\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5\uff0c\u901a\u5e38\u662f\u7531\u4e8e\u6570\u636e\u8868\u7ed3\u6784\u4e0d\u4e00\u81f4\u6216\u6570\u636e\u9519\u8bef\u5bfc\u81f4\u7684\u3002\u89e3\u51b3\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<p><strong>1. \u68c0\u67e5\u6570\u636e\u8868\u7ed3\u6784<\/strong><\/p>\n<ul>\n<li>\u786e\u4fdd\u5173\u8054\u5b57\u6bb5\u5728\u4e24\u4e2a\u6570\u636e\u8868\u4e2d\u90fd\u5b58\u5728\u3002<\/li>\n<li>\u786e\u8ba4\u5b57\u6bb5\u7c7b\u578b\u548c\u957f\u5ea6\u4e00\u81f4\u3002<\/li>\n<li>\u68c0\u67e5\u5b57\u6bb5\u662f\u5426\u5177\u6709\u552f\u4e00\u7d22\u5f15\u6216\u4e3b\u952e\u7ea6\u675f\u3002<\/li>\n<\/ul>\n<p><strong>2. \u4fee\u590d\u6570\u636e\u9519\u8bef<\/strong><\/p>\n<ul>\n<li>\u5982\u679c\u5173\u8054\u5b57\u6bb5\u4e2d\u5b58\u5728\u7a7a\u503c\u6216\u4e0d\u4e00\u81f4\u7684\u6570\u636e\uff0c\u8bf7\u624b\u52a8\u66f4\u6b63\u3002<\/li>\n<li>\u5bf9\u4e8e\u5927\u6570\u636e\u96c6\uff0c\u53ef\u4ee5\u4f7f\u7528\u6570\u636e\u5e93\u5de5\u5177\u6216\u811a\u672c\u6765\u6279\u91cf\u66f4\u65b0\u6570\u636e\u3002<\/li>\n<\/ul>\n<p><strong>3. \u4f7f\u7528 LEFT JOIN<\/strong><\/p>\n<p>\u5982\u679c\u65e0\u6cd5\u89e3\u51b3\u6570\u636e\u9519\u8bef\uff0c\u53ef\u4ee5\u4f7f\u7528 LEFT JOIN \u67e5\u8be2\uff0c\u5ffd\u7565\u4e0d\u5b58\u5728\u5173\u8054\u5b57\u6bb5\u7684\u884c\u3002\u5177\u4f53\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>SELECT * FROM table1 LEFT JOIN table2 ON table1.\u5173\u8054\u5b57\u6bb5 = table2.\u5173\u8054\u5b57\u6bb5<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>4. \u4f18\u5316\u67e5\u8be2<\/strong><\/p>\n<ul>\n<li>\u5728\u5173\u8054\u5b57\u6bb5\u4e0a\u521b\u5efa\u7d22\u5f15\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n<li>\u9650\u5236\u67e5\u8be2\u8fd4\u56de\u7684\u5217\u6570\uff0c\u4ec5\u9009\u62e9\u5fc5\u8981\u7684\u5b57\u6bb5\u3002<\/li>\n<li>\u8003\u8651\u4f7f\u7528\u5b50\u67e5\u8be2\u6216\u89c6\u56fe\u6765\u7b80\u5316\u590d\u6742\u67e5\u8be2\u3002<\/li>\n<\/ul>\n<p><strong>5. \u6392\u9664\u4e0d\u4e00\u81f4\u7684\u6570\u636e<\/strong><\/p>\n<p>\u5982\u679c\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u65e0\u6cd5\u89e3\u51b3\uff0c\u53ef\u4ee5\u8003\u8651\u6392\u9664\u4e0d\u4e00\u81f4\u7684\u6570\u636e\u3002\u4f8b\u5982\uff0c\u5982\u679c\u67d0\u884c\u5728\u5176\u4e2d\u4e00\u4e2a\u6570\u636e\u8868\u4e2d\u5b58\u5728\u5173\u8054\u5b57\u6bb5\u503c\uff0c\u800c\u5728\u53e6\u4e00\u4e2a\u6570\u636e\u8868\u4e2d\u4e0d\u5b58\u5728\uff0c\u5219\u53ef\u4ee5\u5c06\u5176\u4ece\u67e5\u8be2\u7ed3\u679c\u4e2d\u6392\u9664\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u6570\u636e\u8868\u4e24\u4e2a\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u600e\u4e48\u529e\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5e1d\u56fdcms \u6570\u636e\u8868\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u7684\u89e3\u51b3\u65b9\u6cd5\uff1a1. \u68c0\u67e5\u6570\u636e\u8868\u7ed3\u6784\uff0c\u786e\u4fdd\u5173\u8054\u5b57\u6bb5\u5b58\u5728\u4e14\u4e00\u81f4\uff1b2. \u4fee\u590d\u6570\u636e\u9519\u8bef\uff0c\u66f4\u6b63\u7a7a\u503c\u6216\u4e0d\u4e00\u81f4\u7684\u6570\u636e\uff1b3. \u4f7f\u7528 left join \u67e5\u8be2\uff0c\u5ffd\u7565\u4e0d\u4e00\u81f4\u884c\uff1b4. \u4f18\u5316\u67e5\u8be2\uff0c\u521b\u5efa\u7d22\u5f15\u5e76\u9650\u5236\u8fd4\u56de\u5217\u6570\uff1b5. \u6392\u9664\u4e0d\u4e00\u81f4\u6570\u636e\uff0c\u4ece\u67e5\u8be2\u7ed3\u679c\u4e2d\u5254\u9664\u95ee\u9898\u884c\u3002 \u5e1d\u56fdCMS \u6570\u636e\u8868\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u7684\u89e3\u51b3\u65b9\u6cd5 \u95ee\u9898\uff1a\u5e1d\u56fdCMS \u6570\u636e\u8868\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u600e\u4e48\u529e\uff1f \u56de\u7b54\uff1a\u51fa\u73b0\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5\uff0c\u901a\u5e38\u662f\u7531\u4e8e\u6570\u636e\u8868\u7ed3\u6784\u4e0d\u4e00\u81f4\u6216\u6570\u636e\u9519\u8bef\u5bfc\u81f4\u7684\u3002\u89e3\u51b3\u65b9\u6cd5\u5982\u4e0b\uff1a 1. \u68c0\u67e5\u6570\u636e\u8868\u7ed3\u6784 \u786e\u4fdd\u5173\u8054\u5b57\u6bb5\u5728\u4e24\u4e2a\u6570\u636e\u8868\u4e2d\u90fd\u5b58\u5728\u3002 \u786e\u8ba4\u5b57\u6bb5\u7c7b\u578b\u548c\u957f\u5ea6\u4e00\u81f4\u3002 \u68c0\u67e5\u5b57\u6bb5\u662f\u5426\u5177\u6709\u552f\u4e00\u7d22\u5f15\u6216\u4e3b\u952e\u7ea6\u675f\u3002 2. \u4fee\u590d\u6570\u636e\u9519\u8bef \u5982\u679c\u5173\u8054\u5b57\u6bb5\u4e2d\u5b58\u5728\u7a7a\u503c\u6216\u4e0d\u4e00\u81f4\u7684\u6570\u636e\uff0c\u8bf7\u624b\u52a8\u66f4\u6b63\u3002 \u5bf9\u4e8e\u5927\u6570\u636e\u96c6\uff0c\u53ef\u4ee5\u4f7f\u7528\u6570\u636e\u5e93\u5de5\u5177\u6216\u811a\u672c\u6765\u6279\u91cf\u66f4\u65b0\u6570\u636e\u3002 3. \u4f7f\u7528 LEFT JOIN \u5982\u679c\u65e0\u6cd5\u89e3\u51b3\u6570\u636e\u9519\u8bef\uff0c\u53ef\u4ee5\u4f7f\u7528 LEFT JOIN \u67e5\u8be2\uff0c\u5ffd\u7565\u4e0d\u5b58\u5728\u5173\u8054\u5b57\u6bb5\u7684\u884c\u3002\u5177\u4f53\u8bed\u6cd5\u5982\u4e0b\uff1a SELECT * FROM table1 LEFT JOIN table2 ON table1.\u5173\u8054\u5b57\u6bb5 = table2.\u5173\u8054\u5b57\u6bb5 \u767b\u5f55\u540e\u590d\u5236 4. \u4f18\u5316\u67e5\u8be2 \u5728\u5173\u8054\u5b57\u6bb5\u4e0a\u521b\u5efa\u7d22\u5f15\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002 \u9650\u5236\u67e5\u8be2\u8fd4\u56de\u7684\u5217\u6570\uff0c\u4ec5\u9009\u62e9\u5fc5\u8981\u7684\u5b57\u6bb5\u3002 \u8003\u8651\u4f7f\u7528\u5b50\u67e5\u8be2\u6216\u89c6\u56fe\u6765\u7b80\u5316\u590d\u6742\u67e5\u8be2\u3002 5. \u6392\u9664\u4e0d\u4e00\u81f4\u7684\u6570\u636e \u5982\u679c\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u65e0\u6cd5\u89e3\u51b3\uff0c\u53ef\u4ee5\u8003\u8651\u6392\u9664\u4e0d\u4e00\u81f4\u7684\u6570\u636e\u3002\u4f8b\u5982\uff0c\u5982\u679c\u67d0\u884c\u5728\u5176\u4e2d\u4e00\u4e2a\u6570\u636e\u8868\u4e2d\u5b58\u5728\u5173\u8054\u5b57\u6bb5\u503c\uff0c\u800c\u5728\u53e6\u4e00\u4e2a\u6570\u636e\u8868\u4e2d\u4e0d\u5b58\u5728\uff0c\u5219\u53ef\u4ee5\u5c06\u5176\u4ece\u67e5\u8be2\u7ed3\u679c\u4e2d\u6392\u9664\u3002 \u4ee5\u4e0a\u5c31\u662f\u6570\u636e\u8868\u4e24\u4e2a\u5173\u8054\u5b57\u6bb5\u67e5\u8be2\u4e0d\u4e00\u81f4\u600e\u4e48\u529e\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-33817","post","type-post","status-publish","format-standard","hentry","category-cms"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/33817","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=33817"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/33817\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=33817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=33817"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=33817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}