{"id":664,"date":"2024-03-22T09:45:24","date_gmt":"2024-03-22T01:45:24","guid":{"rendered":"https:\/\/www.db2go.net\/?p=664"},"modified":"2024-03-22T09:45:24","modified_gmt":"2024-03-22T01:45:24","slug":"find_in_set-%e5%87%bd%e6%95%b0%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.db2go.net\/?p=664","title":{"rendered":"FIND_IN_SET \u51fd\u6570\u8be6\u89e3"},"content":{"rendered":"<p><code>FIND_IN_SET<\/code>\u51fd\u6570\u5728MySQL\u4e2d\u4e3b\u8981\u7528\u4e8e\u5904\u7406\u90a3\u4e9b\u5c06\u591a\u4e2a\u503c\u5b58\u50a8\u4e3a\u5355\u4e2a\u5b57\u7b26\u4e32\u7684\u5b57\u6bb5\uff0c\u8fd9\u4e9b\u503c\u901a\u8fc7\u9017\u53f7\u5206\u9694\u3002\u8fd9\u4e2a\u51fd\u6570\u641c\u7d22\u6307\u5b9a\u7684\u5b57\u7b26\u4e32\uff08\u79f0\u4e3a&#8221;needle&#8221;\uff0c\u5373\u201c\u9488\u201d\uff09\u662f\u5426\u5b58\u5728\u4e8e\u4e00\u4e2a\u7531\u9017\u53f7\u5206\u9694\u7684\u5b57\u7b26\u4e32\u5217\u8868\uff08\u79f0\u4e3a&#8221;haystack&#8221;\uff0c\u5373\u201c\u5e72\u8349\u5806\u201d\uff09\u4e2d\uff0c\u5e76\u8fd4\u56de\u8be5\u5b57\u7b26\u4e32\u5728\u5217\u8868\u4e2d\u7684\u4f4d\u7f6e\u7d22\u5f15\u3002\u5982\u679c\u5b57\u7b26\u4e32\u4e0d\u5728\u5217\u8868\u4e2d\uff0c\u5219\u8fd4\u56de0\u3002<\/p>\n<h3>\u4f7f\u7528\u793a\u4f8b<\/h3>\n<p>\u5047\u8bbe\u6709\u4e00\u4e2a\u540d\u4e3a<code>users<\/code>\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u540d\u4e3a<code>hobbies<\/code>\u7684\u5b57\u6bb5\uff0c\u7528\u4e8e\u4ee5\u9017\u53f7\u5206\u9694\u7684\u5f62\u5f0f\u5b58\u50a8\u7528\u6237\u7684\u7231\u597d\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>id<\/th>\n<th>name<\/th>\n<th>hobbies<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>\u5f20\u4e09<\/td>\n<td>reading,swimming<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>\u674e\u56db<\/td>\n<td>cycling,reading<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>\u738b\u4e94<\/td>\n<td>swimming,running<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5982\u679c\u60f3\u627e\u51fa\u54ea\u4e9b\u7528\u6237\u628a\u201cswimming\u201d\u4f5c\u4e3a\u7231\u597d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>FIND_IN_SET<\/code>\u8fd9\u6837\u505a\uff1a<\/p>\n<pre><code class=\"language-sql line-numbers\">SELECT * FROM users WHERE FIND_IN_SET('swimming', hobbies) &gt; 0;\n<\/code><\/pre>\n<p>\u8fd9\u5c06\u8fd4\u56de \u5f20\u4e09 \u548c \u738b\u4e94 \u7684\u8bb0\u5f55\uff0c\u56e0\u4e3a\u4ed6\u4eec\u7684\u7231\u597d\u5217\u8868\u4e2d\u5305\u542b\u4e86 \u201cswimming\u201d\u3002<\/p>\n<h3>\u6ce8\u610f\u4e8b\u9879<\/h3>\n<ul>\n<li>\n<p>\u6027\u80fd\u8003\u8651\uff1aFIND_IN_SET \u4e0d\u4f7f\u7528\u7d22\u5f15\uff0c\u56e0\u6b64\u5728\u5927\u578b\u6570\u636e\u96c6\u4e0a\u4f7f\u7528\u65f6\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\u3002\u5f53\u6570\u636e\u91cf\u589e\u5927\u65f6\uff0c\u6bcf\u6b21\u67e5\u8be2\u90fd\u9700\u8981\u626b\u63cf\u6574\u4e2a\u5b57\u6bb5\u6765\u67e5\u627e\u5339\u914d\u9879\u3002<\/p>\n<\/li>\n<li>\n<p>\u6570\u636e\u5e93\u89c4\u8303\u5316\uff1a\u901a\u5e38\uff0c\u4f7f\u7528\u9017\u53f7\u5206\u9694\u503c\u5b58\u50a8\u591a\u503c\u6570\u636e\u662f\u8fdd\u53cd\u6570\u636e\u5e93\u89c4\u8303\u5316\u539f\u5219\u7684\u3002\u66f4\u63a8\u8350\u7684\u505a\u6cd5\u662f\u4f7f\u7528\u5355\u72ec\u7684\u5173\u8054\u8868\u6765\u5b58\u50a8\u591a\u5bf9\u591a\u7684\u5173\u7cfb\u3002\u8fd9\u6837\u4e0d\u4ec5\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u6570\u636e\u5e93\u7ed3\u6784\u66f4\u52a0\u6e05\u6670\u3002<\/p>\n<\/li>\n<li>\n<p>\u9017\u53f7\u5206\u9694\u7684\u9650\u5236\uff1a\u5982\u679c\u6570\u636e\u672c\u8eab\u53ef\u80fd\u5305\u542b\u9017\u53f7\uff0c\u90a3\u4e48 FIND_IN_SET \u53ef\u80fd\u65e0\u6cd5\u6b63\u786e\u89e3\u6790\u5217\u8868\u3002\u6b64\u5916\uff0c\u8fd9\u79cd\u5b58\u50a8\u65b9\u5f0f\u9650\u5236\u4e86\u5bf9\u8fd9\u4e9b\u503c\u8fdb\u884c\u7684\u64cd\u4f5c\u7c7b\u578b\uff0c\u4f8b\u5982\u4e0d\u80fd\u76f4\u63a5\u5bf9\u5b83\u4eec\u8fdb\u884c\u6392\u5e8f\u6216\u8005\u8fc7\u6ee4\u51fa\u552f\u4e00\u503c\u3002<\/p>\n<\/li>\n<li>\n<p>\u66ff\u4ee3\u65b9\u6848\uff1a\u8003\u8651\u4f7f\u7528\u5173\u8054\u8868\u6765\u4ee3\u66ff\u9017\u53f7\u5206\u9694\u7684\u503c\uff0c\u7279\u522b\u662f\u5f53\u5e94\u7528\u9700\u8981\u9891\u7e41\u67e5\u8be2\u8fd9\u4e9b\u503c\u6216\u8005\u968f\u7740\u65f6\u95f4\u6570\u636e\u91cf\u4f1a\u589e\u957f\u65f6\u3002\u5173\u8054\u8868\u53ef\u4ee5\u66f4\u597d\u5730\u5229\u7528\u6570\u636e\u5e93\u7684\u7d22\u5f15\uff0c\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\uff0c\u540c\u65f6\u8fd8\u652f\u6301\u66f4\u590d\u6742\u7684\u67e5\u8be2\u548c\u6570\u636e\u64cd\u4f5c\u3002<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>FIND_IN_SET\u51fd\u6570\u5728MySQL\u4e2d\u4e3b\u8981\u7528\u4e8e\u5904\u7406\u90a3\u4e9b\u5c06\u591a\u4e2a\u503c\u5b58\u50a8\u4e3a\u5355\u4e2a\u5b57\u7b26\u4e32\u7684\u5b57\u6bb5\uff0c\u8fd9\u4e9b\u503c\u901a\u8fc7\u9017\u53f7\u5206\u9694\u3002\u8fd9&hellip;<\/p>\n <a href=\"https:\/\/www.db2go.net\/?p=664\" title=\"FIND_IN_SET \u51fd\u6570\u8be6\u89e3\" class=\"entry-more-link\"><span>Read More<\/span> <span class=\"screen-reader-text\">FIND_IN_SET \u51fd\u6570\u8be6\u89e3<\/span><\/a>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"Layout":"","footnotes":""},"categories":[5],"tags":[],"class_list":["entry","author-suredandan","post-664","post","type-post","status-publish","format-standard","category-mysql"],"views":1898,"_links":{"self":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/664","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=664"}],"version-history":[{"count":1,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/664\/revisions"}],"predecessor-version":[{"id":665,"href":"https:\/\/www.db2go.net\/index.php?rest_route=\/wp\/v2\/posts\/664\/revisions\/665"}],"wp:attachment":[{"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.db2go.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}