{"id":96508,"date":"2024-10-20T10:02:15","date_gmt":"2024-10-20T02:02:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96508\/"},"modified":"2024-10-20T10:02:16","modified_gmt":"2024-10-20T02:02:16","slug":"php%e5%92%8c%e6%95%b8%e6%93%9a%e5%ba%abjoin%e6%8c%87%e4%bb%a4%e5%85%a5%e9%96%80%e6%8c%87%e5%8d%97-php-%e6%95%b8%e6%93%9a%e5%ba%ab-join","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96508\/","title":{"rendered":"PHP\u548c\u6578\u64da\u5eabJOIN\u6307\u4ee4\u5165\u9580\u6307\u5357 (php \u6578\u64da\u5eab join)"},"content":{"rendered":"<h1 id=\"php%e5%92%8c%e6%95%b8%e6%93%9a%e5%ba%abjoin%e6%8c%87%e4%bb%a4%e5%85%a5%e9%96%80%e6%8c%87%e5%8d%97-TocZSAzqSZ\">PHP\u548c\u6578\u64da\u5eabJOIN\u6307\u4ee4\u5165\u9580\u6307\u5357<\/h1>\n<p>\u5728\u73fe\u4ee3\u7db2\u9801\u958b\u767c\u4e2d\uff0cPHP\u548c\u6578\u64da\u5eab\u7684\u7d50\u5408\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u3002\u7279\u5225\u662f\u5728\u8655\u7406\u591a\u500b\u6578\u64da\u8868\u4e4b\u9593\u7684\u95dc\u806f\u6642\uff0cJOIN\u6307\u4ee4\u986f\u5f97\u5c24\u70ba\u91cd\u8981\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0ePHP\u4e2d\u5982\u4f55\u4f7f\u7528JOIN\u6307\u4ee4\u4f86\u6709\u6548\u5730\u67e5\u8a62\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afjoin%e6%8c%87%e4%bb%a4%ef%bc%9f-TocZSAzqSZ\">\u4ec0\u9ebc\u662fJOIN\u6307\u4ee4\uff1f<\/h2>\n<p>JOIN\u6307\u4ee4\u662fSQL\u8a9e\u8a00\u4e2d\u7684\u4e00\u500b\u95dc\u9375\u529f\u80fd\uff0c\u7528\u65bc\u5f9e\u5169\u500b\u6216\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u901a\u904eJOIN\uff0c\u6211\u5011\u53ef\u4ee5\u6839\u64da\u8868\u4e4b\u9593\u7684\u95dc\u806f\u4f86\u7d44\u5408\u6578\u64da\uff0c\u9019\u5728\u8655\u7406\u8907\u96dc\u7684\u6578\u64da\u7d50\u69cb\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"join%e7%9a%84%e9%a1%9e%e5%9e%8b-TocZSAzqSZ\">JOIN\u7684\u985e\u578b<\/h2>\n<p>\u5728SQL\u4e2d\uff0c\u4e3b\u8981\u6709\u56db\u7a2eJOIN\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>INNER JOIN<\/strong>: \u53ea\u8fd4\u56de\u5169\u500b\u8868\u4e2d\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>LEFT JOIN<\/strong>: \u8fd4\u56de\u5de6\u8868\u4e2d\u7684\u6240\u6709\u884c\uff0c\u5373\u4f7f\u53f3\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>RIGHT JOIN<\/strong>: \u8fd4\u56de\u53f3\u8868\u4e2d\u7684\u6240\u6709\u884c\uff0c\u5373\u4f7f\u5de6\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>FULL OUTER JOIN<\/strong>: \u8fd4\u56de\u5169\u500b\u8868\u4e2d\u7684\u6240\u6709\u884c\uff0c\u7121\u8ad6\u662f\u5426\u6709\u5339\u914d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8php%e9%80%b2%e8%a1%8cjoin%e6%9f%a5%e8%a9%a2-TocZSAzqSZ\">\u4f7f\u7528PHP\u9032\u884cJOIN\u67e5\u8a62<\/h2>\n<p>\u5728PHP\u4e2d\uff0c\u6211\u5011\u901a\u5e38\u4f7f\u7528PDO\u6216MySQLi\u4f86\u57f7\u884cSQL\u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528PDO\u9032\u884cINNER JOIN\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nsetAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n\n    \/\/ INNER JOIN\u67e5\u8a62\n    $sql = 'SELECT users.name, orders.amount \n            FROM users \n            INNER JOIN orders ON users.id = orders.user_id';\n    \n    $stmt = $pdo-&gt;prepare($sql);\n    $stmt-&gt;execute();\n\n    \/\/ \u7372\u53d6\u7d50\u679c\n    $results = $stmt-&gt;fetchAll(PDO::FETCH_ASSOC);\n    foreach ($results as $row) {\n        echo '\u7528\u6236\u540d: ' . $row['name'] . ' - \u8a02\u55ae\u91d1\u984d: ' . $row['amount'] . '<br>';\n    }\n} catch (PDOException $e) {\n    echo '\u9023\u63a5\u5931\u6557: ' . $e-&gt;getMessage();\n}\n?&gt;\n<\/code><\/pre>\n<h2 id=\"join%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-TocZSAzqSZ\">JOIN\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0cJOIN\u6307\u4ee4\u53ef\u4ee5\u7528\u65bc\u591a\u7a2e\u5834\u666f\u3002\u4f8b\u5982\uff0c\u5728\u96fb\u5b50\u5546\u52d9\u7db2\u7ad9\u4e2d\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u5f9e\u7528\u6236\u8868\u548c\u8a02\u55ae\u8868\u4e2d\u7372\u53d6\u7528\u6236\u7684\u8a02\u55ae\u4fe1\u606f\u3002\u901a\u904eJOIN\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5c07\u9019\u4e9b\u6578\u64da\u7d50\u5408\u5728\u4e00\u8d77\uff0c\u5f9e\u800c\u63d0\u4f9b\u66f4\u8c50\u5bcc\u7684\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-TocZSAzqSZ\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528JOIN\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fddJOIN\u7684\u689d\u4ef6\u6b63\u78ba\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u91cd\u8907\u3002<\/li>\n<li>\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0cJOIN\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\uff0c\u56e0\u6b64\u9700\u8981\u9032\u884c\u9069\u7576\u7684\u512a\u5316\u3002<\/li>\n<li>\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8JOIN\u67e5\u8a62\u7684\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-TocZSAzqSZ\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1PHP\u4e2d\u7684JOIN\u6307\u4ee4\u5c0d\u65bc\u958b\u767c\u8005\u4f86\u8aaa\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u5b83\u80fd\u5920\u5e6b\u52a9\u6211\u5011\u66f4\u6709\u6548\u5730\u8655\u7406\u6578\u64da\u3002\u7121\u8ad6\u662fINNER JOIN\u9084\u662fLEFT JOIN\uff0c\u6b63\u78ba\u4f7f\u7528\u9019\u4e9b\u6307\u4ee4\u90fd\u80fd\u63d0\u5347\u61c9\u7528\u7684\u6027\u80fd\u548c\u7528\u6236\u9ad4\u9a57\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9019\u5c07\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u548c\u5feb\u901f\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22PHP\u548c\u6578\u64da\u5eabJOIN\u6307\u4ee4\u7684\u5165\u9580\u6307\u5357\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u5730\u5408\u4f75\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\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-96508","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96508","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=96508"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96508\/revisions"}],"predecessor-version":[{"id":96509,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96508\/revisions\/96509"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}