{"id":200518,"date":"2025-05-06T09:06:28","date_gmt":"2025-05-06T01:06:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200518\/"},"modified":"2025-05-06T09:06:28","modified_gmt":"2025-05-06T01:06:28","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88-mysql-%e7%9a%84-where-%e8%af%ad%e5%8f%a5%e6%97%a0%e6%b3%95%e7%9b%b4%e6%8e%a5%e7%94%a8-%e6%a3%80%e7%b4%a2-bool-%e5%80%bc%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200518\/","title":{"rendered":"\u4e3a\u4ec0\u4e48 MySQL \u7684 where \u8bed\u53e5\u65e0\u6cd5\u76f4\u63a5\u7528 `=` \u68c0\u7d22 bool \u503c\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u4e3a\u4ec0\u4e48 MySQL \u7684 where \u8bed\u53e5\u65e0\u6cd5\u76f4\u63a5\u7528 `=` \u68c0\u7d22 bool \u503c\uff1f <\/h1>\n<p>\u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5\u4e00\u53e5\u52aa\u529b\u81ea\u5df1\u7684\u8bdd\u54c8\u54c8~\u54c8\u55bd\uff0c\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\uff0c\u4e3b\u8981\u5185\u5bb9\u662f\u8bb2\u89e3\u7b49\u7b49\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u6536\u85cf\u6216\u8005\u6709\u66f4\u597d\u7684\u5efa\u8bae\u5728\u8bc4\u8bba\u63d0\u51fa\uff0c\u6211\u90fd\u4f1a\u8ba4\u771f\u770b\u7684\uff01\u5927\u5bb6\u4e00\u8d77\u8fdb\u6b65\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241107\/1730957625672c513942bcb.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>mysql \u7684 where \u4e4b\u95f4\u65e0\u6cd5\u4f7f\u7528 = \u68c0\u7d22 bool \u503c\u7684\u539f\u56e0<\/strong><\/p>\n<p>\u5728 mysql \u4e2d\uff0cenum \u7c7b\u578b\u7684\u7d22\u5f15\u662f\u4ece 1 \u5f00\u59cb\u7684\uff0c\u8fd9\u610f\u5473\u7740\u5728\u8868\u7ed3\u6784\u4e2d\u5b9a\u4e49\u7684 is_svddb \u548c is_svddb_match \u5217\u4e2d\u7684 true \u548c false \u503c\u5bf9\u5e94\u4e8e\u7d22\u5f15\u503c 1 \u548c 2\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528 where is_svddb_match = false\uff0cmysql \u5b9e\u9645\u4e0a\u662f\u5728\u6bd4\u8f83 is_svddb_match \u5217\u7684\u7d22\u5f15\u503c\u662f\u5426\u7b49\u4e8e 0\uff0c\u800c\u4e0d\u662f 2\uff0c\u56e0\u6b64\u8fd4\u56de 0 \u884c\u7ed3\u679c\u3002<\/p>\n<p>\u89e3\u51b3\u65b9\u6cd5\u662f\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u6bd4\u8f83 enum \u503c\uff1a<\/p>\n<pre>where is_svddb_match = 'false'<\/pre>\n<p>\u6216\u8005\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u6bd4\u8f83 enum \u503c\uff1a<\/p>\n<pre>where is_svddb_match = 2<\/pre>\n<p>\u56e0\u4e3a false \u5bf9\u5e94\u4e8e\u7d22\u5f15\u503c 2\u3002<\/p>\n<p>\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u4e3a\u4ec0\u4e48 MySQL \u7684 where \u8bed\u53e5\u65e0\u6cd5\u76f4\u63a5\u7528 `=` \u68c0\u7d22 bool \u503c\uff1f \u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6570\u636e\u5e93\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u4e3a\u4ec0\u4e48 MySQL \u7684 wher&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200518","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200518","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200518"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200518\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200518"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200518"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}