{"id":77772,"date":"2024-10-16T11:08:16","date_gmt":"2024-10-16T03:08:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/77772\/"},"modified":"2024-10-16T11:08:17","modified_gmt":"2024-10-16T03:08:17","slug":"mysql%e6%8c%87%e4%bb%a4-bit%ef%bc%88%e4%bd%8d%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/77772\/","title":{"rendered":"MySQL\u6307\u4ee4: BIT\uff08\u4f4d\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-bit%ef%bc%88%e4%bd%8d%ef%bc%89-dWCWQXtTyi\">MySQL\u6307\u4ee4: BIT\uff08\u4f4d\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u95dc\u806f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u985e\u578b\u4ee5\u6eff\u8db3\u4e0d\u540c\u7684\u9700\u6c42\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662fBIT\uff08\u4f4d\uff09\u6578\u64da\u985e\u578b\u3002BIT\u6578\u64da\u985e\u578b\u4e3b\u8981\u7528\u65bc\u5b58\u5132\u4e8c\u9032\u5236\u6578\u64da\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u9ad8\u6548\u5b58\u5132\u548c\u8655\u7406\u5e03\u6797\u503c\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<h2 id=\"bit%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%a6%82%e8%bf%b0-dWCWQXtTyi\">BIT\u6578\u64da\u985e\u578b\u6982\u8ff0<\/h2>\n<p>\u5728MySQL\u4e2d\uff0cBIT\u6578\u64da\u985e\u578b\u7528\u65bc\u5b58\u5132\u4f4d\u5143\u7d44\uff08bit\uff09\uff0c\u5176\u7bc4\u570d\u5f9e0\u523064\u4f4d\u3002\u9019\u610f\u5473\u8457\u60a8\u53ef\u4ee5\u4f7f\u7528BIT\u4f86\u5b58\u5132\u591a\u905464\u500b\u4e8c\u9032\u5236\u4f4d\u3002BIT\u6578\u64da\u985e\u578b\u7684\u4e3b\u8981\u512a\u52e2\u5728\u65bc\u5176\u9ad8\u6548\u7684\u5b58\u5132\u65b9\u5f0f\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u5927\u91cf\u5e03\u6797\u503c\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<h3 id=\"bit%e7%9a%84%e5%ae%9a%e7%be%a9%e8%88%87%e4%bd%bf%e7%94%a8-dWCWQXtTyi\">BIT\u7684\u5b9a\u7fa9\u8207\u4f7f\u7528<\/h3>\n<p>\u5728\u5275\u5efa\u8868\u6642\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528BIT\u6578\u64da\u985e\u578b\u4f86\u5b9a\u7fa9\u6b04\u4f4d\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u662f\u5275\u5efa\u4e00\u500b\u5305\u542bBIT\u6b04\u4f4d\u7684\u8868\u7684SQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE TABLE example (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    is_active BIT(1)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c`is_active`\u6b04\u4f4d\u88ab\u5b9a\u7fa9\u70baBIT(1)\uff0c\u9019\u610f\u5473\u8457\u5b83\u53ef\u4ee5\u5b58\u5132\u4e00\u500b\u4e8c\u9032\u5236\u4f4d\uff0c\u901a\u5e38\u7528\u65bc\u8868\u793a\u5e03\u6797\u503c\uff08\u4f8b\u5982\uff0c0\u8868\u793a\u5047\uff0c1\u8868\u793a\u771f\uff09\u3002<\/p>\n<h2 id=\"bit%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e7%9a%84%e6%93%8d%e4%bd%9c-dWCWQXtTyi\">BIT\u6578\u64da\u985e\u578b\u7684\u64cd\u4f5c<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u591a\u7a2e\u6307\u4ee4\u4f86\u64cd\u4f5cBIT\u6578\u64da\u985e\u578b\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u64cd\u4f5c\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-dWCWQXtTyi\">\u63d2\u5165\u6578\u64da<\/h3>\n<p>\u8981\u5411BIT\u6b04\u4f4d\u63d2\u5165\u6578\u64da\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>INSERT INTO example (is_active) VALUES (b'1');<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c`b&#8217;1&#8217;`\u8868\u793a\u4e00\u500b\u4e8c\u9032\u5236\u503c\uff0c\u60a8\u4e5f\u53ef\u4ee5\u4f7f\u7528`b&#8217;0&#8217;`\u4f86\u63d2\u5165\u5047\u503c\u3002<\/p>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-dWCWQXtTyi\">\u67e5\u8a62\u6578\u64da<\/h3>\n<p>\u8981\u67e5\u8a62BIT\u6b04\u4f4d\u7684\u6578\u64da\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM example WHERE is_active = b'1';<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u6240\u6709`is_active`\u70ba\u771f\uff081\uff09\u7684\u8a18\u9304\u3002<\/p>\n<h3 id=\"%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-dWCWQXtTyi\">\u66f4\u65b0\u6578\u64da<\/h3>\n<p>\u8981\u66f4\u65b0BIT\u6b04\u4f4d\u7684\u6578\u64da\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>UPDATE example SET is_active = b'0' WHERE id = 1;<\/code><\/pre>\n<p>\u9019\u5c07\u628aID\u70ba1\u7684\u8a18\u9304\u7684`is_active`\u6b04\u4f4d\u66f4\u65b0\u70ba\u5047\uff080\uff09\u3002<\/p>\n<h2 id=\"bit%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e7%9a%84%e5%84%aa%e7%bc%ba%e9%bb%9e-dWCWQXtTyi\">BIT\u6578\u64da\u985e\u578b\u7684\u512a\u7f3a\u9ede<\/h2>\n<h3 id=\"%e5%84%aa%e9%bb%9e-dWCWQXtTyi\">\u512a\u9ede<\/h3>\n<ul>\n<li><strong>\u9ad8\u6548\u5b58\u5132\uff1a<\/strong>BIT\u6578\u64da\u985e\u578b\u80fd\u5920\u4ee5\u6700\u5c0f\u7684\u7a7a\u9593\u5b58\u5132\u5e03\u6797\u503c\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u5927\u91cf\u5e03\u6797\u503c\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<li><strong>\u7c21\u55ae\u6613\u7528\uff1a<\/strong>\u4f7f\u7528BIT\u6578\u64da\u985e\u578b\u53ef\u4ee5\u7c21\u5316\u5e03\u6797\u503c\u7684\u8655\u7406\uff0c\u8b93\u67e5\u8a62\u548c\u66f4\u65b0\u64cd\u4f5c\u66f4\u52a0\u76f4\u89c0\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%bc%ba%e9%bb%9e-dWCWQXtTyi\">\u7f3a\u9ede<\/h3>\n<ul>\n<li><strong>\u53ef\u8b80\u6027\u5dee\uff1a<\/strong>\u76f4\u63a5\u4f7f\u7528\u4e8c\u9032\u5236\u4f4d\u53ef\u80fd\u6703\u4f7f\u6578\u64da\u7684\u53ef\u8b80\u6027\u964d\u4f4e\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u6578\u64da\u5206\u6790\u6642\u3002<\/li>\n<li><strong>\u517c\u5bb9\u6027\u554f\u984c\uff1a<\/strong>\u67d0\u4e9b\u820a\u7248\u672c\u7684MySQL\u53ef\u80fd\u5c0dBIT\u6578\u64da\u985e\u578b\u7684\u652f\u6301\u4e0d\u5920\u5b8c\u5584\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u517c\u5bb9\u6027\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-dWCWQXtTyi\">\u7e3d\u7d50<\/h2>\n<p>BIT\u6578\u64da\u985e\u578b\u5728MySQL\u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7279\u5225\u9069\u5408\u9700\u8981\u9ad8\u6548\u5b58\u5132\u548c\u8655\u7406\u5e03\u6797\u503c\u7684\u61c9\u7528\u5834\u666f\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528BIT\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u7dad\u8b77\u6027\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684\u4e3b\u6a5f\u670d\u52d9\u81f3\u95dc\u91cd\u8981\u3002\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\u7684\u8cc7\u8a0a\uff0c\u53ef\u4ee5\u5e6b\u52a9\u60a8\u505a\u51fa\u66f4\u660e\u667a\u7684\u9078\u64c7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e2d\u7684BIT\u6307\u4ee4\uff0c\u638c\u63e1\u5982\u4f55\u4f7f\u7528\u4f4d\u6570\u636e\u7c7b\u578b\u8fdb\u884c\u9ad8\u6548\u7684\u6570\u636e\u5b58\u50a8\u4e0e\u64cd\u4f5c\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-77772","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77772","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=77772"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77772\/revisions"}],"predecessor-version":[{"id":77773,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77772\/revisions\/77773"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=77772"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=77772"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=77772"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}