{"id":22920,"date":"2024-11-21T13:56:27","date_gmt":"2024-11-21T05:56:27","guid":{"rendered":"https:\/\/fwq.ai\/blog\/22920\/"},"modified":"2024-11-21T13:56:27","modified_gmt":"2024-11-21T05:56:27","slug":"thinkphp%e4%b8%ad%e7%9a%84%e8%a1%a8%e6%9f%a5%e8%af%a2%e8%af%ad%e5%8f%a5%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/22920\/","title":{"rendered":"ThinkPHP\u4e2d\u7684\u8868\u67e5\u8be2\u8bed\u53e5\u5982\u4f55\u4f7f\u7528"},"content":{"rendered":"<\/p>\n

\u4e00\u3001\u67e5\u8be2\u5355\u4e2a\u5b57\u6bb5<\/strong><\/p>\n

\u8981\u67e5\u8be2\u8868\u4e2d\u7684\u67d0\u4e2a\u5b57\u6bb5\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 table() \u51fd\u6570\u6765\u6307\u5b9a\u8981\u67e5\u8be2\u7684\u8868\uff0c\u800c find() \u51fd\u6570\u5219\u8868\u793a\u53ea\u67e5\u8be2\u4e00\u6761\u7ed3\u679c\uff0c\u7c7b\u4f3c\u4e8e MySQL \u4e2d\u7684 SELECT * FROM table_name WHERE column_name = ‘value’ LIMIT 1\u3002<\/p>\n

\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n

$data = Db::table('user')-&gt;where('id', 1)-&gt;value('username');\necho $data; \/\/ \u8f93\u51fa\u7ed3\u679c\uff1a'\u5f20\u4e09'<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 table() \u51fd\u6570\u6307\u5b9a\u8981\u67e5\u8be2\u7684\u8868\u4e3a user\uff0c\u518d\u4f7f\u7528 where() \u51fd\u6570\u6765\u6307\u5b9a\u67e5\u8be2\u6761\u4ef6\uff0c\u8fd9\u91cc\u6211\u4eec\u53ea\u67e5\u8be2 id \u4e3a 1 \u7684\u8bb0\u5f55\uff0c\u5e76\u4f7f\u7528 value() \u51fd\u6570\u67e5\u8be2 username \u5b57\u6bb5\u7684\u503c\u3002<\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
\u4e8c\u3001\u67e5\u8be2\u6574\u6761\u8bb0\u5f55<\/strong><\/p>\n
\u8981\u83b7\u53d6\u8868\u4e2d\u7684\u5b8c\u6574\u8bb0\u5f55\uff0c\u53ef\u4f7f\u7528 find() \u6216 select() \u65b9\u6cd5\u3002\u5176\u4e2d\uff0cfind() \u51fd\u6570\u8868\u793a\u67e5\u8be2\u7b2c\u4e00\u6761\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\uff0c\u800c select() \u51fd\u6570\u5219\u8868\u793a\u67e5\u8be2\u6240\u6709\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\u3002<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
$data = Db::table('user')-&gt;where('username', '\u5f20\u4e09')-&gt;find();\nprint_r($data); \/\/ \u8f93\u51fa\u7ed3\u679c\uff1a['id' =&gt; 1, 'username' =&gt; '\u5f20\u4e09', 'age' =&gt; 25]<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5148\u4f7f\u7528 table() \u51fd\u6570\u6307\u5b9a\u8981\u67e5\u8be2\u7684\u8868\u4e3a user\uff0c\u518d\u4f7f\u7528 where() \u51fd\u6570\u6307\u5b9a\u67e5\u8be2\u6761\u4ef6\uff0c\u67e5\u8be2 username \u4e3a ‘\u5f20\u4e09’ \u7684\u8bb0\u5f55\uff0c\u6700\u540e\u4f7f\u7528 find() \u51fd\u6570\u67e5\u8be2\u6574\u6761\u8bb0\u5f55\u3002<\/p>\n
\u4e09\u3001\u67e5\u8be2\u591a\u4e2a\u5b57\u6bb5<\/strong><\/p>\n
\u5982\u679c\u8981\u67e5\u8be2\u8868\u4e2d\u7684\u591a\u4e2a\u5b57\u6bb5\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 field() \u51fd\u6570\u6765\u6307\u5b9a\u8981\u67e5\u8be2\u7684\u5b57\u6bb5\uff0c\u591a\u4e2a\u5b57\u6bb5\u4e4b\u95f4\u7528\u9017\u53f7\u9694\u5f00\u3002<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
$data = Db::table('user')-&gt;where('id', 1)-&gt;field('username, age')-&gt;find();\nprint_r($data); \/\/ \u8f93\u51fa\u7ed3\u679c\uff1a['username' =&gt; '\u5f20\u4e09', 'age' =&gt; 25]<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 field() \u51fd\u6570\u6307\u5b9a\u8981\u67e5\u8be2\u7684\u5b57\u6bb5\u4e3a username \u548c age\uff0c\u67e5\u8be2 id \u4e3a 1 \u7684\u8bb0\u5f55\uff0c\u6700\u540e\u4f7f\u7528 find() \u51fd\u6570\u67e5\u8be2\u6574\u6761\u8bb0\u5f55\u3002<\/p>\n
\u56db\u3001\u67e5\u8be2\u591a\u6761\u8bb0\u5f55<\/strong><\/p>\n
\u4f7f\u7528 select() \u51fd\u6570\u53ef\u67e5\u8be2\u8868\u4e2d\u7b26\u5408\u67e5\u8be2\u6761\u4ef6\u7684\u591a\u4e2a\u8bb0\u5f55\u3002\u4e0efind()\u51fd\u6570\u7684\u4e0d\u540c\u4e4b\u5904\u5728\u4e8e\uff0cselect()\u51fd\u6570\u8fd4\u56de\u7531\u7ed3\u679c\u96c6\u6570\u7ec4\u6784\u6210\u7684\u4e8c\u7ef4\u6570\u7ec4\u3002<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
$data = Db::table('user')-&gt;where('age', '&gt;', 20)-&gt;select();\nprint_r($data); \/\/ \u8f93\u51fa\u7ed3\u679c\uff1a[['id' =&gt; 1, 'username' =&gt; '\u5f20\u4e09', 'age' =&gt; 25], ['id' =&gt; 2, 'username' =&gt; '\u674e\u56db', 'age' =&gt; 28]]<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 table() \u51fd\u6570\u6307\u5b9a\u8981\u67e5\u8be2\u7684\u8868\u4e3a user\uff0c\u518d\u4f7f\u7528 where() \u51fd\u6570\u6307\u5b9a\u67e5\u8be2\u6761\u4ef6\uff0c\u67e5\u8be2\u5e74\u9f84\u5927\u4e8e 20 \u7684\u8bb0\u5f55\uff0c\u5e76\u4f7f\u7528 select() \u51fd\u6570\u67e5\u8be2\u591a\u6761\u8bb0\u5f55\u3002<\/p>\n
\u4e94\u3001\u6392\u5e8f\u67e5\u8be2<\/strong><\/p>\n
\u5982\u679c\u8981\u5bf9\u67e5\u8be2\u7ed3\u679c\u8fdb\u884c\u6392\u5e8f\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 order() \u51fd\u6570\uff0c\u5176\u4e2d\u53c2\u6570\u53ef\u4ee5\u662f asc \u8868\u793a\u5347\u5e8f\uff0c\u4e5f\u53ef\u4ee5\u662f desc \u8868\u793a\u964d\u5e8f\u3002<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
$data = Db::table('user')-&gt;where('age', '&gt;', 20)-&gt;order('age desc')-&gt;select();\nprint_r($data); \/\/ \u8f93\u51fa\u7ed3\u679c\uff1a[['id' =&gt; 2, 'username' =&gt; '\u674e\u56db', 'age' =&gt; 28], ['id' =&gt; 1, 'username' =&gt; '\u5f20\u4e09', 'age' =&gt; 25]]<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 where() \u51fd\u6570\u6307\u5b9a\u67e5\u8be2\u6761\u4ef6\uff0c\u67e5\u8be2\u5e74\u9f84\u5927\u4e8e 20 \u7684\u8bb0\u5f55\uff0c\u5e76\u4f7f\u7528 order() \u51fd\u6570\u5c06\u7ed3\u679c\u6309\u7167 age \u964d\u5e8f\u6392\u5217\uff0c\u6700\u540e\u4f7f\u7528 select() \u51fd\u6570\u67e5\u8be2\u591a\u6761\u8bb0\u5f55\u3002<\/p>\n
\u516d\u3001\u5206\u9875\u67e5\u8be2<\/strong><\/p>\n
\u5982\u679c\u67e5\u8be2\u7ed3\u679c\u6709\u5f88\u591a\u6761\u8bb0\u5f55\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 limit() \u51fd\u6570\u8fdb\u884c\u5206\u9875\u67e5\u8be2\uff0c\u5176\u4e2d\u7b2c\u4e00\u4e2a\u53c2\u6570\u8868\u793a\u8bb0\u5f55\u5f00\u59cb\u7684\u4f4d\u7f6e\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u8868\u793a\u67e5\u8be2\u7684\u8bb0\u5f55\u6570\u3002<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
$data = Db::table('user')-&gt;where('age', '&gt;', 20)-&gt;order('age desc')-&gt;limit(0, 1)-&gt;select();\nprint_r($data); \/\/ \u8f93\u51fa\u7ed3\u679c\uff1a[['id' =&gt; 2, 'username' =&gt; '\u674e\u56db', 'age' =&gt; 28]]<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 where() \u51fd\u6570\u6307\u5b9a\u67e5\u8be2\u6761\u4ef6\uff0c\u67e5\u8be2\u5e74\u9f84\u5927\u4e8e 20 \u7684\u8bb0\u5f55\uff0c\u5e76\u4f7f\u7528 order() \u51fd\u6570\u5c06\u7ed3\u679c\u6309\u7167 age \u964d\u5e8f\u6392\u5217\uff0c\u518d\u4f7f\u7528 limit() \u51fd\u6570\u67e5\u8be2\u7b2c\u4e00\u6761\u8bb0\u5f55\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662fThinkPHP\u4e2d\u7684\u8868\u67e5\u8be2\u8bed\u53e5\u5982\u4f55\u4f7f\u7528\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":"
\u4e00\u3001\u67e5\u8be2\u5355\u4e2a\u5b57\u6bb5 \u8981\u67e5\u8be2\u8868\u4e2d\u7684\u67d0\u4e2a\u5b57\u6bb5\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 table() \u51fd\u6570\u6765\u6307\u5b9a\u8981\u67e5\u8be2\u7684\u8868\uff0c\u800c find() \u51fd\u6570\u5219\u8868\u793a\u53ea\u67e5\u8be2\u4e00\u6761\u7ed3\u679c\uff0c\u7c7b\u4f3c\u4e8e MySQL \u4e2d\u7684 SELECT * FROM table_name WHERE column_name = ‘value’ LIMIT 1\u3002 \u793a\u4f8b\u4ee3\u7801\uff1a $data = Db::table(‘user’)-&gt;where(‘id’, 1)-&gt;value(‘username’); echo $data; \/\/ \u8f93\u51fa\u7ed3\u679c\uff1a’\u5f20\u4e09’ \u767b\u5f55\u540e\u590d\u5236 \u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 table() \u51fd\u6570\u6307\u5b9a\u8981\u67e5\u8be2\u7684\u8868\u4e3a user\uff0c\u518d\u4f7f\u7528 where() \u51fd\u6570\u6765\u6307\u5b9a\u67e5\u8be2\u6761\u4ef6\uff0c\u8fd9\u91cc\u6211\u4eec\u53ea\u67e5\u8be2 id \u4e3a 1 \u7684\u8bb0\u5f55\uff0c\u5e76\u4f7f\u7528 value() \u51fd\u6570\u67e5\u8be2 username \u5b57\u6bb5\u7684\u503c\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4e8c\u3001\u67e5\u8be2\u6574\u6761\u8bb0\u5f55 \u8981\u83b7\u53d6\u8868\u4e2d\u7684\u5b8c\u6574\u8bb0\u5f55\uff0c\u53ef\u4f7f\u7528 find() \u6216 select() \u65b9\u6cd5\u3002\u5176\u4e2d\uff0cfind() \u51fd\u6570\u8868\u793a\u67e5\u8be2\u7b2c\u4e00\u6761\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\uff0c\u800c select() \u51fd\u6570\u5219\u8868\u793a\u67e5\u8be2\u6240\u6709\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\u3002 \u793a\u4f8b\u4ee3\u7801\uff1a $data = Db::table(‘user’)-&gt;where(‘username’, ‘\u5f20\u4e09’)-&gt;find(); print_r($data); \/\/ \u8f93\u51fa\u7ed3\u679c\uff1a[‘id’ =&gt; 1, ‘username’ =&gt; ‘\u5f20\u4e09’, ‘age’ =&gt; 25] \u767b\u5f55\u540e\u590d\u5236 \u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5148\u4f7f\u7528 table() \u51fd\u6570\u6307\u5b9a\u8981\u67e5\u8be2\u7684\u8868\u4e3a user\uff0c\u518d\u4f7f\u7528 where() […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-22920","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/22920","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=22920"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/22920\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=22920"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=22920"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=22920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}