{"id":168513,"date":"2024-11-06T13:00:39","date_gmt":"2024-11-06T05:00:39","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168513\/"},"modified":"2024-11-06T13:00:39","modified_gmt":"2024-11-06T05:00:39","slug":"sql-%e4%b8%ad-where-11-%e8%aa%9e%e5%8f%a5%e7%9a%84%e4%bd%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168513\/","title":{"rendered":"SQL \u4e2d WHERE 1=1 \u8a9e\u53e5\u7684\u4f5c\u7528"},"content":{"rendered":"<h1 id=\"sql-%e4%b8%ad-where-11-%e8%aa%9e%e5%8f%a5%e7%9a%84%e4%bd%9c%e7%94%a8-jtRTbZQEEq\">SQL \u4e2d WHERE 1=1 \u8a9e\u53e5\u7684\u4f5c\u7528<\/h1>\n<p>\u5728 SQL \u67e5\u8a62\u4e2d\uff0c<code>WHERE<\/code> \u5b50\u53e5\u662f\u7528\u4f86\u904e\u6ffe\u8a18\u9304\u7684\u95dc\u9375\u90e8\u5206\u3002\u5b83\u5141\u8a31\u7528\u6236\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u9078\u64c7\u6578\u64da\u3002\u7136\u800c\uff0c\u7576\u6211\u5011\u5728 <code>WHERE<\/code> \u5b50\u53e5\u4e2d\u4f7f\u7528 <code>1=1<\/code> \u6642\uff0c\u9019\u500b\u8a9e\u53e5\u7684\u4f5c\u7528\u548c\u610f\u7fa9\u53c8\u662f\u4ec0\u9ebc\u5462\uff1f\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u4e00\u554f\u984c\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-where-11%ef%bc%9f-jtRTbZQEEq\">\u4ec0\u9ebc\u662f WHERE 1=1\uff1f<\/h2>\n<p><code>WHERE 1=1<\/code> \u662f\u4e00\u500b\u7e3d\u662f\u8fd4\u56de\u771f\u503c\u7684\u689d\u4ef6\u3002\u9019\u610f\u5473\u8457\u5728 SQL \u67e5\u8a62\u4e2d\uff0c\u9019\u500b\u689d\u4ef6\u4e0d\u6703\u904e\u6ffe\u6389\u4efb\u4f55\u8a18\u9304\u3002\u5b83\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u70ba\u4e86\u65b9\u4fbf\u5f8c\u7e8c\u7684\u689d\u4ef6\u6dfb\u52a0\u3002\u9019\u5728\u52d5\u614b\u751f\u6210 SQL \u67e5\u8a62\u6642\u7279\u5225\u6709\u7528\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-where-11-%e7%9a%84%e5%a0%b4%e6%99%af-jtRTbZQEEq\">\u4f7f\u7528 WHERE 1=1 \u7684\u5834\u666f<\/h2>\n<p>\u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u9700\u8981\u6839\u64da\u7528\u6236\u7684\u8f38\u5165\u52d5\u614b\u69cb\u5efa SQL \u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u7528\u6236\u641c\u7d22\u529f\u80fd\uff0c\u5141\u8a31\u7528\u6236\u6839\u64da\u591a\u500b\u689d\u4ef6\u904e\u6ffe\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE 1=1<\/code><\/pre>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6839\u64da\u7528\u6236\u7684\u9078\u64c7\uff0c\u6211\u5011\u53ef\u80fd\u6703\u6dfb\u52a0\u5176\u4ed6\u689d\u4ef6\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE 1=1\nAND age &gt; 18\nAND city = 'Hong Kong'<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c<code>WHERE 1=1<\/code> \u4f7f\u5f97\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u6dfb\u52a0\u5176\u4ed6\u689d\u4ef6\uff0c\u800c\u4e0d\u9700\u8981\u64d4\u5fc3\u5728\u7b2c\u4e00\u500b\u689d\u4ef6\u4e4b\u524d\u6dfb\u52a0 <code>AND<\/code> \u6216 <code>OR<\/code>\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u4ee3\u78bc\u7684\u8907\u96dc\u6027\uff0c\u4e26\u63d0\u9ad8\u53ef\u8b80\u6027\u3002<\/p>\n<h2 id=\"%e5%84%aa%e9%bb%9e%e8%88%87%e7%bc%ba%e9%bb%9e-jtRTbZQEEq\">\u512a\u9ede\u8207\u7f3a\u9ede<\/h2>\n<h3 id=\"%e5%84%aa%e9%bb%9e-jtRTbZQEEq\">\u512a\u9ede<\/h3>\n<ul>\n<li><strong>\u7c21\u5316\u67e5\u8a62\u69cb\u5efa\uff1a<\/strong>\u4f7f\u7528 <code>WHERE 1=1<\/code> \u53ef\u4ee5\u7c21\u5316\u52d5\u614b\u67e5\u8a62\u7684\u69cb\u5efa\u904e\u7a0b\uff0c\u7279\u5225\u662f\u5728\u6709\u591a\u500b\u53ef\u9078\u689d\u4ef6\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u53ef\u8b80\u6027\uff1a<\/strong>\u4ee3\u78bc\u66f4\u6e05\u6670\uff0c\u6613\u65bc\u7dad\u8b77\uff0c\u56e0\u70ba\u958b\u767c\u8005\u4e0d\u9700\u8981\u5728\u6bcf\u500b\u689d\u4ef6\u4e4b\u524d\u6dfb\u52a0\u908f\u8f2f\u904b\u7b97\u7b26\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%bc%ba%e9%bb%9e-jtRTbZQEEq\">\u7f3a\u9ede<\/h3>\n<ul>\n<li><strong>\u6027\u80fd\u5f71\u97ff\uff1a<\/strong>\u96d6\u7136 <code>WHERE 1=1<\/code> \u5c0d\u65bc\u5c0f\u578b\u6578\u64da\u96c6\u5f71\u97ff\u4e0d\u5927\uff0c\u4f46\u5728\u5927\u578b\u6578\u64da\u96c6\u4e0a\uff0c\u9019\u6a23\u7684\u67e5\u8a62\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u56e0\u70ba\u5b83\u6703\u5c0e\u81f4\u4e0d\u5fc5\u8981\u7684\u8a08\u7b97\u3002<\/li>\n<li><strong>\u53ef\u8b80\u6027\u554f\u984c\uff1a<\/strong>\u5c0d\u65bc\u4e0d\u719f\u6089\u6b64\u7528\u6cd5\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c<code>WHERE 1=1<\/code> \u53ef\u80fd\u6703\u9020\u6210\u56f0\u60d1\uff0c\u56e0\u70ba\u5b83\u770b\u8d77\u4f86\u4f3c\u4e4e\u6c92\u6709\u5be6\u969b\u610f\u7fa9\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-jtRTbZQEEq\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u4f7f\u7528 <code>WHERE 1=1<\/code> \u6642\uff0c\u958b\u767c\u8005\u61c9\u8a72\u8003\u616e\u4ee5\u4e0b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li>\u50c5\u5728\u9700\u8981\u52d5\u614b\u69cb\u5efa\u67e5\u8a62\u6642\u4f7f\u7528\uff0c\u4e26\u78ba\u4fdd\u67e5\u8a62\u7684\u53ef\u8b80\u6027\u3002<\/li>\n<li>\u5728\u5927\u578b\u6578\u64da\u96c6\u4e0a\u9032\u884c\u6027\u80fd\u6e2c\u8a66\uff0c\u4ee5\u78ba\u4fdd\u67e5\u8a62\u7684\u6548\u7387\u3002<\/li>\n<li>\u5728\u4ee3\u78bc\u4e2d\u6dfb\u52a0\u8a3b\u91cb\uff0c\u89e3\u91cb\u4f7f\u7528 <code>WHERE 1=1<\/code> \u7684\u539f\u56e0\uff0c\u4ee5\u4fbf\u5176\u4ed6\u958b\u767c\u8005\u80fd\u5920\u7406\u89e3\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-jtRTbZQEEq\">\u7d50\u8ad6<\/h2>\n<p>\u7e3d\u7684\u4f86\u8aaa\uff0c<code>WHERE 1=1<\/code> \u5728 SQL \u67e5\u8a62\u4e2d\u662f\u4e00\u500b\u6709\u7528\u7684\u5de5\u5177\uff0c\u7279\u5225\u662f\u5728\u52d5\u614b\u751f\u6210\u67e5\u8a62\u6642\u3002\u5b83\u53ef\u4ee5\u7c21\u5316\u67e5\u8a62\u7684\u69cb\u5efa\u904e\u7a0b\uff0c\u63d0\u9ad8\u53ef\u8b80\u6027\u3002\u7136\u800c\uff0c\u958b\u767c\u8005\u5728\u4f7f\u7528\u6642\u4e5f\u61c9\u8a72\u8003\u616e\u5230\u6027\u80fd\u548c\u53ef\u8b80\u6027\u554f\u984c\u3002\u4e86\u89e3\u9019\u4e00\u8a9e\u53e5\u7684\u4f5c\u7528\u548c\u6700\u4f73\u5be6\u8e10\uff0c\u5c07\u6709\u52a9\u65bc\u66f4\u6709\u6548\u5730\u7de8\u5beb SQL \u67e5\u8a62\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 SQL \u4e2d WHERE 1=1 \u8a9e\u53e5\u7684\u4f5c\u7528\uff0c\u5982\u4f55\u7c21\u5316\u67e5\u8a62\u689d\u4ef6\uff0c\u63d0\u5347\u52d5\u614b SQL \u7684\u9748\u6d3b\u6027\u8207\u53ef\u8b80\u6027\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-168513","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168513","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=168513"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168513\/revisions"}],"predecessor-version":[{"id":168514,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168513\/revisions\/168514"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}