{"id":174837,"date":"2024-11-08T00:10:23","date_gmt":"2024-11-07T16:10:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/174837\/"},"modified":"2024-11-08T00:10:23","modified_gmt":"2024-11-07T16:10:23","slug":"%e5%a6%82%e4%bd%95%e9%8f%88%e6%8e%a5%e5%85%b6%e4%bb%96%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e8%a1%a8-%e9%8f%88%e6%8e%a5%e5%85%b6%e4%bb%96%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/174837\/","title":{"rendered":"\u5982\u4f55\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868 (\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e9%8f%88%e6%8e%a5%e5%85%b6%e4%bb%96%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e8%a1%a8-nhYLYnGOhW\">\u5982\u4f55\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002\u8a31\u591a\u61c9\u7528\u7a0b\u5e8f\u9700\u8981\u5f9e\u591a\u500b\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\uff0c\u4ee5\u4fbf\u9032\u884c\u5206\u6790\u6216\u751f\u6210\u5831\u544a\u3002\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868\u662f\u4e00\u7a2e\u6709\u6548\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u4e4b\u9593\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8f%88%e6%8e%a5%ef%bc%9f-nhYLYnGOhW\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u93c8\u63a5\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u93c8\u63a5\u662f\u6307\u5728\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u8a2a\u554f\u53e6\u4e00\u500b\u6578\u64da\u5eab\u7684\u8868\u3002\u9019\u7a2e\u6280\u8853\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u4e4b\u9593\u9032\u884c\u67e5\u8a62\u548c\u64cd\u4f5c\uff0c\u800c\u7121\u9700\u5c07\u6578\u64da\u8907\u88fd\u5230\u672c\u5730\u6578\u64da\u5eab\u4e2d\u3002\u9019\u5c0d\u65bc\u9700\u8981\u6574\u5408\u4f86\u81ea\u4e0d\u540c\u4f86\u6e90\u7684\u6578\u64da\u7684\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\uff0c\u5c24\u5176\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e9%8f%88%e6%8e%a5%e5%85%b6%e4%bb%96%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e8%a1%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%ad%a5%e9%a9%9f-nhYLYnGOhW\">\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868\u7684\u57fa\u672c\u6b65\u9a5f<\/h2>\n<p>\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868\u901a\u5e38\u6d89\u53ca\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li>\u78ba\u5b9a\u8981\u93c8\u63a5\u7684\u6578\u64da\u5eab\u548c\u8868\u3002<\/li>\n<li>\u8a2d\u7f6e\u6578\u64da\u5eab\u9023\u63a5\u3002<\/li>\n<li>\u4f7f\u7528\u9069\u7576\u7684\u67e5\u8a62\u8a9e\u8a00\u9032\u884c\u67e5\u8a62\u3002<\/li>\n<\/ul>\n<h3 id=\"1-%e7%a2%ba%e5%ae%9a%e8%a6%81%e9%8f%88%e6%8e%a5%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e5%92%8c%e8%a1%a8-nhYLYnGOhW\">1. \u78ba\u5b9a\u8981\u93c8\u63a5\u7684\u6578\u64da\u5eab\u548c\u8868<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u78ba\u5b9a\u8981\u93c8\u63a5\u7684\u6578\u64da\u5eab\u548c\u8868\u7684\u540d\u7a31\u3002\u9019\u4e9b\u4fe1\u606f\u901a\u5e38\u53ef\u4ee5\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\u627e\u5230\u3002<\/p>\n<h3 id=\"2-%e8%a8%ad%e7%bd%ae%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-nhYLYnGOhW\">2. \u8a2d\u7f6e\u6578\u64da\u5eab\u9023\u63a5<\/h3>\n<p>\u5728\u5927\u591a\u6578\u60c5\u6cc1\u4e0b\uff0c\u60a8\u9700\u8981\u5728\u61c9\u7528\u7a0b\u5e8f\u4e2d\u8a2d\u7f6e\u6578\u64da\u5eab\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 MySQL \u7684\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>\n$servername = \"localhost\";\n$username = \"username\";\n$password = \"password\";\n$dbname1 = \"database1\";\n$dbname2 = \"database2\";\n\n\/\/ \u5275\u5efa\u9023\u63a5\n$conn1 = new mysqli($servername, $username, $password, $dbname1);\n$conn2 = new mysqli($servername, $username, $password, $dbname2);\n\n\/\/ \u6aa2\u67e5\u9023\u63a5\nif ($conn1-&gt;connect_error) {\n    die(\"Connection failed: \" . $conn1-&gt;connect_error);\n}\nif ($conn2-&gt;connect_error) {\n    die(\"Connection failed: \" . $conn2-&gt;connect_error);\n}\n<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e9%81%a9%e7%95%b6%e7%9a%84%e6%9f%a5%e8%a9%a2%e8%aa%9e%e8%a8%80%e9%80%b2%e8%a1%8c%e6%9f%a5%e8%a9%a2-nhYLYnGOhW\">3. \u4f7f\u7528\u9069\u7576\u7684\u67e5\u8a62\u8a9e\u8a00\u9032\u884c\u67e5\u8a62<\/h3>\n<p>\u4e00\u65e6\u8a2d\u7f6e\u4e86\u9023\u63a5\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 SQL \u67e5\u8a62\u4f86\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5f9e\u5169\u500b\u4e0d\u540c\u7684\u6578\u64da\u5eab\u4e2d\u67e5\u8a62\u6578\u64da\uff1a<\/p>\n<pre><code>\n$sql = \"SELECT a.column1, b.column2 \n        FROM database1.table1 AS a \n        JOIN database2.table2 AS b \n        ON a.id = b.foreign_id\";\n$result = $conn1-&gt;query($sql);\n\nif ($result-&gt;num_rows &gt; 0) {\n    while($row = $result-&gt;fetch_assoc()) {\n        echo \"Column1: \" . $row[\"column1\"]. \" - Column2: \" . $row[\"column2\"]. \"<br>\";\n    }\n} else {\n    echo \"0 results\";\n}\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-nhYLYnGOhW\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u60a8\u64c1\u6709\u8a2a\u554f\u5176\u4ed6\u6578\u64da\u5eab\u7684\u6b0a\u9650\u3002<\/li>\n<li>\u8003\u616e\u6027\u80fd\u554f\u984c\uff0c\u56e0\u70ba\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u53ef\u80fd\u6703\u6bd4\u55ae\u4e00\u6578\u64da\u5eab\u67e5\u8a62\u6162\u3002<\/li>\n<li>\u6ce8\u610f\u6578\u64da\u4e00\u81f4\u6027\uff0c\u78ba\u4fdd\u6578\u64da\u5728\u4e0d\u540c\u6578\u64da\u5eab\u4e4b\u9593\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-nhYLYnGOhW\">\u7e3d\u7d50<\/h2>\n<p>\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u6280\u8853\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u4e4b\u9593\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002\u901a\u904e\u8a2d\u7f6e\u9069\u7576\u7684\u6578\u64da\u5eab\u9023\u63a5\u548c\u4f7f\u7528 SQL \u67e5\u8a62\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u6574\u5408\u4f86\u81ea\u4e0d\u540c\u4f86\u6e90\u7684\u6578\u64da\u3002\u7121\u8ad6\u60a8\u662f\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u4e86\u89e3\u5982\u4f55\u93c8\u63a5\u6578\u64da\u5eab\u5c07\u5c0d\u60a8\u7684\u958b\u767c\u5de5\u4f5c\u5927\u6709\u88e8\u76ca\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u93c8\u63a5\u5176\u4ed6\u6578\u64da\u5eab\u7684\u8868\uff0c\u5be6\u73fe\u6578\u64da\u6574\u5408\u8207\u5171\u4eab\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u67e5\u8a62\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-174837","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174837","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=174837"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174837\/revisions"}],"predecessor-version":[{"id":174838,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174837\/revisions\/174838"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=174837"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=174837"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=174837"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}