{"id":186170,"date":"2024-11-11T03:41:28","date_gmt":"2024-11-10T19:41:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186170\/"},"modified":"2024-11-11T03:41:29","modified_gmt":"2024-11-10T19:41:29","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e8%a6%96%e5%9c%96%e7%9a%84%e5%bb%ba%e7%ab%8b%e6%96%b9%e6%b3%95%e5%8f%8a%e5%84%aa%e5%8b%a2%ef%bc%88%e5%a4%9a%e5%80%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%bb%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186170\/","title":{"rendered":"\u6578\u64da\u5eab\u8868\u8996\u5716\u7684\u5efa\u7acb\u65b9\u6cd5\u53ca\u512a\u52e2\uff08\u591a\u500b\u6578\u64da\u5eab\u8868\u5efa\u8996\u5716\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e8%a6%96%e5%9c%96%e7%9a%84%e5%bb%ba%e7%ab%8b%e6%96%b9%e6%b3%95%e5%8f%8a%e5%84%aa%e5%8b%a2%ef%bc%88%e5%a4%9a%e5%80%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%bb%ba-amgUGTzYvw\">\u6578\u64da\u5eab\u8868\u8996\u5716\u7684\u5efa\u7acb\u65b9\u6cd5\u53ca\u512a\u52e2\uff08\u591a\u500b\u6578\u64da\u5eab\u8868\u5efa\u8996\u5716\uff09<\/h1>\n<p>\u5728\u73fe\u4ee3\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u8996\u5716\uff08View\uff09\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\u3002\u8996\u5716\u662f\u4e00\u7a2e\u865b\u64ec\u8868\uff0c\u5b83\u662f\u57fa\u65bc\u4e00\u500b\u6216\u591a\u500b\u6578\u64da\u5eab\u8868\u7684\u67e5\u8a62\u7d50\u679c\u3002\u901a\u904e\u4f7f\u7528\u8996\u5716\uff0c\u6578\u64da\u5eab\u7528\u6236\u53ef\u4ee5\u7c21\u5316\u6578\u64da\u7684\u67e5\u8a62\u904e\u7a0b\uff0c\u4e26\u63d0\u9ad8\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5efa\u7acb\u6578\u64da\u5eab\u8868\u8996\u5716\u53ca\u5176\u512a\u52e2\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u591a\u500b\u6578\u64da\u5eab\u8868\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<h2 id=\"%e8%a6%96%e5%9c%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-amgUGTzYvw\">\u8996\u5716\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u8996\u5716\u662f\u4e00\u500b\u865b\u64ec\u7684\u8868\uff0c\u4e26\u4e0d\u5132\u5b58\u6578\u64da\uff0c\u800c\u662f\u5132\u5b58\u67e5\u8a62\u3002\u7576\u7528\u6236\u67e5\u8a62\u8996\u5716\u6642\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u6703\u57f7\u884c\u8996\u5716\u6240\u5b9a\u7fa9\u7684\u67e5\u8a62\uff0c\u4e26\u8fd4\u56de\u7d50\u679c\u3002\u8996\u5716\u53ef\u4ee5\u5305\u542b\u4f86\u81ea\u4e00\u500b\u6216\u591a\u500b\u8868\u7684\u6578\u64da\uff0c\u4e26\u4e14\u53ef\u4ee5\u9032\u884c\u904e\u6ffe\u3001\u6392\u5e8f\u548c\u805a\u5408\u7b49\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e5%bb%ba%e7%ab%8b%e8%a6%96%e5%9c%96%e7%9a%84%e6%96%b9%e6%b3%95-amgUGTzYvw\">\u5efa\u7acb\u8996\u5716\u7684\u65b9\u6cd5<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u5efa\u7acb\u8996\u5716\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE VIEW \u8996\u5716\u540d\u7a31 AS\nSELECT \u6b04\u4f4d1, \u6b04\u4f4d2, ...\nFROM \u8868\u540d\u7a31\nWHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<strong>customers<\/strong>\uff08\u5ba2\u6236\uff09\u548c<strong>orders<\/strong>\uff08\u8a02\u55ae\uff09\u3002\u6211\u5011\u5e0c\u671b\u5efa\u7acb\u4e00\u500b\u8996\u5716\uff0c\u986f\u793a\u6bcf\u4f4d\u5ba2\u6236\u7684\u8a02\u55ae\u6578\u91cf\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE VIEW customer_order_count AS\nSELECT c.customer_id, c.customer_name, COUNT(o.order_id) AS order_count\nFROM customers c\nLEFT JOIN orders o ON c.customer_id = o.customer_id\nGROUP BY c.customer_id, c.customer_name;<\/code><\/pre>\n<p>\u9019\u500b\u8996\u5716\u5c07\u986f\u793a\u6bcf\u4f4d\u5ba2\u6236\u53ca\u5176\u5c0d\u61c9\u7684\u8a02\u55ae\u6578\u91cf\uff0c\u4e26\u4e14\u53ef\u4ee5\u96a8\u6642\u67e5\u8a62\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e5%80%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%bb%ba%e8%a6%96%e5%9c%96%e7%9a%84%e5%84%aa%e5%8b%a2-amgUGTzYvw\">\u591a\u500b\u6578\u64da\u5eab\u8868\u5efa\u8996\u5716\u7684\u512a\u52e2<\/h2>\n<h3 id=\"1-%e6%95%b8%e6%93%9a%e6%95%b4%e5%90%88-amgUGTzYvw\">1. \u6578\u64da\u6574\u5408<\/h3>\n<p>\u901a\u904e\u8996\u5716\uff0c\u53ef\u4ee5\u5c07\u4f86\u81ea\u591a\u500b\u8868\u7684\u6578\u64da\u6574\u5408\u5728\u4e00\u8d77\uff0c\u63d0\u4f9b\u4e00\u500b\u7d71\u4e00\u7684\u6578\u64da\u8996\u5716\u3002\u9019\u5c0d\u65bc\u9700\u8981\u5f9e\u4e0d\u540c\u4f86\u6e90\u7372\u53d6\u6578\u64da\u7684\u5831\u544a\u548c\u5206\u6790\u7279\u5225\u6709\u7528\u3002<\/p>\n<h3 id=\"2-%e7%b0%a1%e5%8c%96%e6%9f%a5%e8%a9%a2-amgUGTzYvw\">2. \u7c21\u5316\u67e5\u8a62<\/h3>\n<p>\u4f7f\u7528\u8996\u5716\u53ef\u4ee5\u7c21\u5316\u8907\u96dc\u7684\u67e5\u8a62\u3002\u7528\u6236\u53ea\u9700\u67e5\u8a62\u8996\u5716\uff0c\u800c\u4e0d\u5fc5\u6bcf\u6b21\u90fd\u7de8\u5beb\u8907\u96dc\u7684 SQL \u8a9e\u53e5\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n<h3 id=\"3-%e6%8f%90%e9%ab%98%e5%ae%89%e5%85%a8%e6%80%a7-amgUGTzYvw\">3. \u63d0\u9ad8\u5b89\u5168\u6027<\/h3>\n<p>\u8996\u5716\u53ef\u4ee5\u9650\u5236\u7528\u6236\u5c0d\u5e95\u5c64\u6578\u64da\u7684\u8a2a\u554f\u3002\u901a\u904e\u53ea\u986f\u793a\u5fc5\u8981\u7684\u6b04\u4f4d\u548c\u6578\u64da\uff0c\u8996\u5716\u53ef\u4ee5\u4fdd\u8b77\u654f\u611f\u4fe1\u606f\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u7684\u5b89\u5168\u6027\u3002<\/p>\n<h3 id=\"4-%e5%a2%9e%e5%bc%b7%e5%8f%af%e7%b6%ad%e8%ad%b7%e6%80%a7-amgUGTzYvw\">4. \u589e\u5f37\u53ef\u7dad\u8b77\u6027<\/h3>\n<p>\u7576\u6578\u64da\u5eab\u7d50\u69cb\u767c\u751f\u8b8a\u5316\u6642\uff0c\u66f4\u65b0\u8996\u5716\u6bd4\u66f4\u65b0\u6240\u6709\u67e5\u8a62\u8981\u7c21\u55ae\u5f97\u591a\u3002\u9019\u4f7f\u5f97\u6578\u64da\u5eab\u7684\u7dad\u8b77\u5de5\u4f5c\u8b8a\u5f97\u66f4\u52a0\u9ad8\u6548\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-amgUGTzYvw\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eab\u8868\u8996\u5716\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u67e5\u8a62\u6578\u64da\u3002\u901a\u904e\u5efa\u7acb\u57fa\u65bc\u591a\u500b\u6578\u64da\u5eab\u8868\u7684\u8996\u5716\uff0c\u7528\u6236\u53ef\u4ee5\u5be6\u73fe\u6578\u64da\u6574\u5408\u3001\u7c21\u5316\u67e5\u8a62\u3001\u63d0\u9ad8\u5b89\u5168\u6027\u548c\u589e\u5f37\u53ef\u7dad\u8b77\u6027\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u8996\u5716\u7684\u4f7f\u7528\u7121\u7591\u662f\u63d0\u5347\u5de5\u4f5c\u6548\u7387\u7684\u91cd\u8981\u624b\u6bb5\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u76f8\u95dc\u6280\u8853\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\u3002\u6211\u5011\u63d0\u4f9b\u5404\u7a2e <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u60a8\u7684\u6578\u64da\u548c\u61c9\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5efa\u7acb\u591a\u500b\u6578\u64da\u5eab\u8868\u7684\u8996\u5716\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u67e5\u8a62\u904e\u7a0b\uff0c\u4e26\u589e\u5f37\u6578\u64da\u5b89\u5168\u6027\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-186170","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186170","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=186170"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186170\/revisions"}],"predecessor-version":[{"id":186171,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186170\/revisions\/186171"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}