{"id":63744,"date":"2024-10-14T02:07:15","date_gmt":"2024-10-13T18:07:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/63744\/"},"modified":"2024-10-14T02:07:15","modified_gmt":"2024-10-13T18:07:15","slug":"mongodb%e8%a1%93%e8%aa%9e-%e9%9a%8e%e6%ae%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/63744\/","title":{"rendered":"MongoDB\u8853\u8a9e &#8211; \u968e\u6bb5"},"content":{"rendered":"<h1 id=\"mongodb%e8%a1%93%e8%aa%9e-%e9%9a%8e%e6%ae%b5-hwxKWIneKu\">MongoDB\u8853\u8a9e &#8211; \u968e\u6bb5<\/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\u5df2\u7d93\u6210\u70ba\u8a31\u591a\u958b\u767c\u8005\u548c\u4f01\u696d\u7684\u9996\u9078\u3002MongoDB\u7684\u9748\u6d3b\u6027\u548c\u53ef\u64f4\u5c55\u6027\u4f7f\u5176\u5728\u8655\u7406\u5927\u91cf\u975e\u7d50\u69cb\u5316\u6578\u64da\u6642\u8868\u73fe\u51fa\u8272\u3002\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u6df1\u5165\u63a2\u8a0eMongoDB\u4e2d\u7684\u300c\u968e\u6bb5\u300d\u8853\u8a9e\uff0c\u4e26\u4e86\u89e3\u5176\u5728\u6578\u64da\u8655\u7406\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e9%9a%8e%e6%ae%b5%ef%bc%9f-hwxKWIneKu\">\u4ec0\u9ebc\u662f\u968e\u6bb5\uff1f<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c\u300c\u968e\u6bb5\u300d\u901a\u5e38\u6307\u7684\u662f\u5728\u805a\u5408\u7ba1\u9053\u4e2d\u9032\u884c\u6578\u64da\u8655\u7406\u7684\u4e0d\u540c\u6b65\u9a5f\u3002\u805a\u5408\u7ba1\u9053\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u5141\u8a31\u7528\u6236\u4ee5\u591a\u500b\u6b65\u9a5f\u4f86\u8655\u7406\u548c\u8f49\u63db\u6578\u64da\u3002\u6bcf\u500b\u968e\u6bb5\u90fd\u53ef\u4ee5\u57f7\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\uff0c\u4f8b\u5982\u904e\u6ffe\u3001\u6392\u5e8f\u3001\u5206\u7d44\u7b49\uff0c\u6700\u7d42\u751f\u6210\u6240\u9700\u7684\u7d50\u679c\u3002<\/p>\n<h2 id=\"%e8%81%9a%e5%90%88%e7%ae%a1%e9%81%93%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-hwxKWIneKu\">\u805a\u5408\u7ba1\u9053\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>\u805a\u5408\u7ba1\u9053\u7531\u4e00\u7cfb\u5217\u7684\u968e\u6bb5\u7d44\u6210\uff0c\u6bcf\u500b\u968e\u6bb5\u90fd\u4ee5\u4e00\u500b\u6587\u6a94\u8868\u793a\u3002\u9019\u4e9b\u6587\u6a94\u5b9a\u7fa9\u4e86\u8981\u57f7\u884c\u7684\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u805a\u5408\u7ba1\u9053\u7684\u4e00\u500b\u7c21\u55ae\u793a\u4f8b\uff1a<\/p>\n<pre><code>{\n  $match: { status: \"A\" }\n},\n{\n  $group: {\n    _id: \"$cust_id\",\n    total: { $sum: \"$amount\" }\n  }\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7b2c\u4e00\u500b\u968e\u6bb5\u662f\u4f7f\u7528$match\u4f86\u904e\u6ffe\u51fa\u72c0\u614b\u70ba&#8221;A&#8221;\u7684\u6587\u6a94\uff0c\u7b2c\u4e8c\u500b\u968e\u6bb5\u662f\u4f7f\u7528$group\u4f86\u6839\u64da\u5ba2\u6236ID\u9032\u884c\u5206\u7d44\uff0c\u4e26\u8a08\u7b97\u6bcf\u500b\u5ba2\u6236\u7684\u7e3d\u91d1\u984d\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e7%9a%84%e8%81%9a%e5%90%88%e9%9a%8e%e6%ae%b5-hwxKWIneKu\">\u5e38\u898b\u7684\u805a\u5408\u968e\u6bb5<\/h2>\n<ul>\n<li><strong>$match<\/strong>: \u7528\u65bc\u904e\u6ffe\u6587\u6a94\uff0c\u50c5\u8fd4\u56de\u7b26\u5408\u689d\u4ef6\u7684\u6587\u6a94\u3002<\/li>\n<li><strong>$group<\/strong>: \u5c07\u6587\u6a94\u5206\u7d44\uff0c\u4e26\u5c0d\u6bcf\u7d44\u57f7\u884c\u805a\u5408\u64cd\u4f5c\uff0c\u5982\u8a08\u7b97\u7e3d\u548c\u6216\u5e73\u5747\u503c\u3002<\/li>\n<li><strong>$sort<\/strong>: \u5c0d\u6587\u6a94\u9032\u884c\u6392\u5e8f\uff0c\u53ef\u4ee5\u6839\u64da\u4e00\u500b\u6216\u591a\u500b\u5b57\u6bb5\u9032\u884c\u5347\u5e8f\u6216\u964d\u5e8f\u6392\u5e8f\u3002<\/li>\n<li><strong>$project<\/strong>: \u7528\u65bc\u9078\u64c7\u8981\u8fd4\u56de\u7684\u5b57\u6bb5\uff0c\u4e26\u53ef\u4ee5\u5c0d\u5b57\u6bb5\u9032\u884c\u91cd\u547d\u540d\u6216\u8a08\u7b97\u65b0\u5b57\u6bb5\u3002<\/li>\n<li><strong>$limit<\/strong>: \u9650\u5236\u8fd4\u56de\u7684\u6587\u6a94\u6578\u91cf\u3002<\/li>\n<li><strong>$skip<\/strong>: \u8df3\u904e\u6307\u5b9a\u6578\u91cf\u7684\u6587\u6a94\uff0c\u901a\u5e38\u7528\u65bc\u5206\u9801\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%9a%8e%e6%ae%b5%e7%9a%84%e5%9f%b7%e8%a1%8c%e9%a0%86%e5%ba%8f-hwxKWIneKu\">\u968e\u6bb5\u7684\u57f7\u884c\u9806\u5e8f<\/h2>\n<p>\u5728\u805a\u5408\u7ba1\u9053\u4e2d\uff0c\u968e\u6bb5\u7684\u57f7\u884c\u9806\u5e8f\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002MongoDB\u6703\u6309\u7167\u5b9a\u7fa9\u7684\u9806\u5e8f\u4f9d\u6b21\u57f7\u884c\u6bcf\u500b\u968e\u6bb5\u3002\u9019\u610f\u5473\u8457\uff0c\u524d\u9762\u7684\u968e\u6bb5\u6703\u5f71\u97ff\u5f8c\u9762\u7684\u968e\u6bb5\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5728$match\u968e\u6bb5\u904e\u6ffe\u6389\u4e86\u5927\u91cf\u6587\u6a94\uff0c\u90a3\u9ebc\u5f8c\u7e8c\u7684$group\u968e\u6bb5\u5c07\u53ea\u8655\u7406\u904e\u6ffe\u5f8c\u7684\u6587\u6a94\uff0c\u5f9e\u800c\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e7%a4%ba%e4%be%8b-hwxKWIneKu\">\u5be6\u969b\u61c9\u7528\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u92b7\u552e\u6578\u64da\u7684\u96c6\u5408\uff0c\u4e26\u5e0c\u671b\u8a08\u7b97\u6bcf\u500b\u7522\u54c1\u7684\u7e3d\u92b7\u552e\u984d\u3002\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u805a\u5408\u7ba1\u9053\uff1a<\/p>\n<pre><code>db.sales.aggregate([\n  { $match: { status: \"completed\" } },\n  { $group: { _id: \"$product_id\", totalSales: { $sum: \"$amount\" } } },\n  { $sort: { totalSales: -1 } }\n])<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u9996\u5148\u904e\u6ffe\u51fa\u72c0\u614b\u70ba\u300ccompleted\u300d\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\u964d\u5e8f\u6392\u5e8f\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-hwxKWIneKu\">\u7e3d\u7d50<\/h2>\n<p>MongoDB\u7684\u805a\u5408\u7ba1\u9053\u548c\u968e\u6bb5\u63d0\u4f9b\u4e86\u4e00\u7a2e\u9748\u6d3b\u4e14\u5f37\u5927\u7684\u65b9\u5f0f\u4f86\u8655\u7406\u548c\u5206\u6790\u6578\u64da\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u4e0d\u540c\u7684\u968e\u6bb5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9ad8\u6548\u5730\u5f9e\u5927\u91cf\u6578\u64da\u4e2d\u63d0\u53d6\u6709\u50f9\u503c\u7684\u4fe1\u606f\u3002\u4e86\u89e3\u9019\u4e9b\u8853\u8a9e\u548c\u64cd\u4f5c\u5c0d\u65bc\u4efb\u4f55\u5e0c\u671b\u5728MongoDB\u4e2d\u9032\u884c\u6578\u64da\u5206\u6790\u7684\u958b\u767c\u8005\u4f86\u8aaa\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684MongoDB\u61c9\u7528\uff0c\u8acb\u8003\u616e\u6211\u5011\u7684\u670d\u52d9\u3002\u6211\u5011\u63d0\u4f9b\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u548c\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MongoDB\u8853\u8a9e\u4e2d\u7684\u300c\u968e\u6bb5\u300d\uff0c\u63a2\u7d22\u6578\u64da\u8655\u7406\u6d41\u7a0b\u4e2d\u7684\u5404\u500b\u6b65\u9a5f\uff0c\u63d0\u5347\u60a8\u7684\u6578\u64da\u7ba1\u7406\u6280\u80fd\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-63744","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63744","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=63744"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63744\/revisions"}],"predecessor-version":[{"id":63745,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63744\/revisions\/63745"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=63744"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=63744"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=63744"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}