{"id":63732,"date":"2024-10-14T02:01:15","date_gmt":"2024-10-13T18:01:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/63732\/"},"modified":"2024-10-14T02:01:16","modified_gmt":"2024-10-13T18:01:16","slug":"mongodb%e8%a1%93%e8%aa%9e-%e7%ae%a1%e9%81%93","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/63732\/","title":{"rendered":"MongoDB\u8853\u8a9e &#8211; \u7ba1\u9053"},"content":{"rendered":"<h1 id=\"mongodb%e8%a1%93%e8%aa%9e-%e7%ae%a1%e9%81%93-gRClrBTIBC\">MongoDB\u8853\u8a9e &#8211; \u7ba1\u9053<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cMongoDB\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684NoSQL\u6578\u64da\u5eab\uff0c\u56e0\u5176\u9748\u6d3b\u6027\u548c\u53ef\u64f4\u5c55\u6027\u800c\u53d7\u5230\u5ee3\u6cdb\u4f7f\u7528\u3002MongoDB\u7684\u67e5\u8a62\u8a9e\u8a00\u4e2d\u6709\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5373\u201c\u7ba1\u9053\u201d\uff08Pipeline\uff09\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMongoDB\u4e2d\u7684\u7ba1\u9053\u6982\u5ff5\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\uff0c\u4ee5\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e00\u8853\u8a9e\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%ae%a1%e9%81%93%ef%bc%9f-gRClrBTIBC\">\u4ec0\u9ebc\u662f\u7ba1\u9053\uff1f<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c\u7ba1\u9053\u662f\u4e00\u7a2e\u6578\u64da\u8655\u7406\u7684\u65b9\u5f0f\uff0c\u5141\u8a31\u7528\u6236\u901a\u904e\u4e00\u7cfb\u5217\u7684\u64cd\u4f5c\u4f86\u8f49\u63db\u548c\u8655\u7406\u6578\u64da\u3002\u9019\u4e9b\u64cd\u4f5c\u53ef\u4ee5\u5305\u62ec\u904e\u6ffe\u3001\u6392\u5e8f\u3001\u5206\u7d44\u548c\u805a\u5408\u7b49\u3002\u7ba1\u9053\u7684\u4e3b\u8981\u7279\u9ede\u662f\u5b83\u5011\u662f\u93c8\u5f0f\u7684\uff0c\u9019\u610f\u5473\u8457\u6bcf\u500b\u64cd\u4f5c\u7684\u8f38\u51fa\u90fd\u53ef\u4ee5\u4f5c\u70ba\u4e0b\u4e00\u500b\u64cd\u4f5c\u7684\u8f38\u5165\u3002<\/p>\n<h2 id=\"%e7%ae%a1%e9%81%93%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-gRClrBTIBC\">\u7ba1\u9053\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>MongoDB\u7684\u7ba1\u9053\u901a\u5e38\u4f7f\u7528\u805a\u5408\u6846\u67b6\u4f86\u5be6\u73fe\u3002\u805a\u5408\u6846\u67b6\u4e2d\u7684\u6bcf\u500b\u64cd\u4f5c\u90fd\u88ab\u7a31\u70ba\u4e00\u500b\u201c\u968e\u6bb5\u201d\uff08Stage\uff09\uff0c\u9019\u4e9b\u968e\u6bb5\u4ee5\u6578\u7d44\u7684\u5f62\u5f0f\u7d44\u5408\u5728\u4e00\u8d77\u3002\u4ee5\u4e0b\u662f\u7ba1\u9053\u7684\u57fa\u672c\u7d50\u69cb\uff1a<\/p>\n<pre><code>\ndb.collection.aggregate([\n    { $match: { field: value } },\n    { $group: { _id: \"$field\", total: { $sum: \"$amount\" } } },\n    { $sort: { total: -1 } }\n])\n<\/code><\/pre>\n<h3 id=\"%e7%ae%a1%e9%81%93%e9%9a%8e%e6%ae%b5%e7%9a%84%e8%a9%b3%e7%b4%b0%e4%bb%8b%e7%b4%b9-gRClrBTIBC\">\u7ba1\u9053\u968e\u6bb5\u7684\u8a73\u7d30\u4ecb\u7d39<\/h3>\n<ul>\n<li><strong>$match<\/strong>: \u7528\u65bc\u904e\u6ffe\u6578\u64da\uff0c\u50c5\u8fd4\u56de\u7b26\u5408\u689d\u4ef6\u7684\u6587\u6a94\u3002<\/li>\n<li><strong>$group<\/strong>: \u5c07\u6587\u6a94\u5206\u7d44\uff0c\u4e26\u53ef\u4ee5\u9032\u884c\u805a\u5408\u8a08\u7b97\uff0c\u4f8b\u5982\u8a08\u7b97\u7e3d\u548c\u3001\u5e73\u5747\u503c\u7b49\u3002<\/li>\n<li><strong>$sort<\/strong>: \u5c0d\u7d50\u679c\u9032\u884c\u6392\u5e8f\uff0c\u53ef\u4ee5\u6839\u64da\u4e00\u500b\u6216\u591a\u500b\u5b57\u6bb5\u9032\u884c\u5347\u5e8f\u6216\u964d\u5e8f\u6392\u5e8f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%ae%a1%e9%81%93%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-gRClrBTIBC\">\u7ba1\u9053\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>\u7ba1\u9053\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u975e\u5e38\u9748\u6d3b\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u5177\u9ad4\u7684\u4f8b\u5b50\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528\u7ba1\u9053\u4f86\u5206\u6790\u92b7\u552e\u6578\u64da\uff1a<\/p>\n<pre><code>\ndb.sales.aggregate([\n    { $match: { status: \"completed\" } },\n    { $group: { _id: \"$productId\", totalSales: { $sum: \"$amount\" } } },\n    { $sort: { totalSales: -1 } }\n])\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u9996\u5148\u904e\u6ffe\u51fa\u72c0\u614b\u70ba\u201ccompleted\u201d\u7684\u92b7\u552e\u8a18\u9304\uff0c\u7136\u5f8c\u6839\u64da\u7522\u54c1ID\u9032\u884c\u5206\u7d44\uff0c\u8a08\u7b97\u6bcf\u500b\u7522\u54c1\u7684\u7e3d\u92b7\u552e\u984d\uff0c\u6700\u5f8c\u6309\u7e3d\u92b7\u552e\u984d\u9032\u884c\u964d\u5e8f\u6392\u5e8f\u3002<\/p>\n<h2 id=\"%e7%ae%a1%e9%81%93%e7%9a%84%e5%84%aa%e5%8b%a2-gRClrBTIBC\">\u7ba1\u9053\u7684\u512a\u52e2<\/h2>\n<p>\u4f7f\u7528\u7ba1\u9053\u7684\u4e3b\u8981\u512a\u52e2\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u6548\u6027<\/strong>: \u7ba1\u9053\u64cd\u4f5c\u5728\u6578\u64da\u5eab\u5167\u90e8\u9032\u884c\uff0c\u6e1b\u5c11\u4e86\u6578\u64da\u50b3\u8f38\u7684\u958b\u92b7\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027<\/strong>: \u7528\u6236\u53ef\u4ee5\u6839\u64da\u9700\u6c42\u81ea\u7531\u7d44\u5408\u4e0d\u540c\u7684\u64cd\u4f5c\uff0c\u6eff\u8db3\u5404\u7a2e\u67e5\u8a62\u9700\u6c42\u3002<\/li>\n<li><strong>\u53ef\u8b80\u6027<\/strong>: \u7ba1\u9053\u7684\u7d50\u69cb\u6e05\u6670\uff0c\u6613\u65bc\u7406\u89e3\u548c\u7dad\u8b77\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gRClrBTIBC\">\u7e3d\u7d50<\/h2>\n<p>MongoDB\u7684\u7ba1\u9053\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u9ad8\u6548\u5730\u8655\u7406\u548c\u5206\u6790\u6578\u64da\u3002\u901a\u904e\u9748\u6d3b\u7684\u64cd\u4f5c\u7d44\u5408\uff0c\u7ba1\u9053\u53ef\u4ee5\u6eff\u8db3\u5404\u7a2e\u8907\u96dc\u7684\u67e5\u8a62\u9700\u6c42\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u4f86\u652f\u6301\u60a8\u7684MongoDB\u61c9\u7528\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MongoDB\u4e2d\u7684\u7ba1\u9053\u8853\u8a9e\uff0c\u63a2\u7d22\u6578\u64da\u8655\u7406\u548c\u8f49\u63db\u7684\u5f37\u5927\u529f\u80fd\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u548c\u9748\u6d3b\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-63732","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63732","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=63732"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63732\/revisions"}],"predecessor-version":[{"id":63733,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63732\/revisions\/63733"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=63732"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=63732"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=63732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}