{"id":247335,"date":"2024-01-02T20:37:21","date_gmt":"2024-01-02T12:37:21","guid":{"rendered":"https:\/\/www.idc.net\/help\/247335\/"},"modified":"2024-01-02T20:37:21","modified_gmt":"2024-01-02T12:37:21","slug":"mongodb-%e6%9c%af%e8%af%ad-%e8%81%9a%e5%90%88","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/247335\/","title":{"rendered":"MongoDB \u672f\u8bed &#8211; \u805a\u5408"},"content":{"rendered":"<p><title>MongoDB \u672f\u8bed - \u805a\u5408<\/title><\/p>\n<h1 id=\"mongodb-%e6%9c%af%e8%af%ad-%e8%81%9a%e5%90%88-AwMwYerCsc\"> MongoDB \u672f\u8bed - \u805a\u5408<\/h1>\n<p>\u5728MongoDB\u4e2d\uff0c\u805a\u5408\u662f\u4e00\u79cd\u6570\u636e\u5904\u7406\u64cd\u4f5c\uff0c\u7528\u4e8e\u5bf9\u96c6\u5408\u4e2d\u7684\u6587\u6863\u8fdb\u884c\u5206\u7ec4\u3001\u7b5b\u9009\u3001\u6392\u5e8f\u548c\u8ba1\u7b97\u7b49\u64cd\u4f5c\u3002\u805a\u5408\u64cd\u4f5c\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u4eba\u5458\u66f4\u9ad8\u6548\u5730\u5904\u7406\u5927\u91cf\u6570\u636e\uff0c\u5e76\u4ece\u4e2d\u63d0\u53d6\u6709\u7528\u7684\u4fe1\u606f\u3002<\/p>\n<h2 id=\"%e8%81%9a%e5%90%88%e7%ae%a1%e9%81%93-AwMwYerCsc\">\u805a\u5408\u7ba1\u9053<\/h2>\n<p>\u805a\u5408\u7ba1\u9053\u662fMongoDB\u4e2d\u7528\u4e8e\u5904\u7406\u805a\u5408\u64cd\u4f5c\u7684\u5de5\u5177\u3002\u5b83\u662f\u4e00\u4e2a\u7531\u591a\u4e2a\u9636\u6bb5\u7ec4\u6210\u7684\u7ba1\u9053\uff0c\u6bcf\u4e2a\u9636\u6bb5\u90fd\u4f1a\u5bf9\u8f93\u5165\u7684\u6587\u6863\u8fdb\u884c\u5904\u7406\uff0c\u5e76\u5c06\u7ed3\u679c\u4f20\u9012\u7ed9\u4e0b\u4e00\u4e2a\u9636\u6bb5\u3002\u805a\u5408\u7ba1\u9053\u53ef\u4ee5\u6309\u7167\u7279\u5b9a\u7684\u987a\u5e8f\u6267\u884c\u591a\u4e2a\u9636\u6bb5\uff0c\u4ee5\u5b9e\u73b0\u590d\u6742\u7684\u6570\u636e\u5904\u7406\u9700\u6c42\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u805a\u5408\u7ba1\u9053\u9636\u6bb5\uff1a<\/p>\n<ul>\n<li><strong>$match\uff1a<\/strong>\u7528\u4e8e\u7b5b\u9009\u7b26\u5408\u6307\u5b9a\u6761\u4ef6\u7684\u6587\u6863\u3002<\/li>\n<li><strong>$group\uff1a<\/strong>\u7528\u4e8e\u6309\u7167\u6307\u5b9a\u7684\u5b57\u6bb5\u5bf9\u6587\u6863\u8fdb\u884c\u5206\u7ec4\u3002<\/li>\n<li><strong>$sort\uff1a<\/strong>\u7528\u4e8e\u5bf9\u6587\u6863\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n<li><strong>$project\uff1a<\/strong>\u7528\u4e8e\u9009\u62e9\u9700\u8981\u8fd4\u56de\u7684\u5b57\u6bb5\u3002<\/li>\n<li><strong>$limit\uff1a<\/strong>\u7528\u4e8e\u9650\u5236\u8fd4\u56de\u7ed3\u679c\u7684\u6570\u91cf\u3002<\/li>\n<li><strong>$skip\uff1a<\/strong>\u7528\u4e8e\u8df3\u8fc7\u6307\u5b9a\u6570\u91cf\u7684\u6587\u6863\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%a4%ba%e4%be%8b-AwMwYerCsc\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u805a\u5408\u64cd\u4f5c\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\ndb.sales.aggregate([\n  { $match: { date: { $gte: ISODate(\"2022-01-01\"), $lt: ISODate(\"2022-02-01\") } } },\n  { $group: { _id: \"$product\", totalSales: { $sum: \"$quantity\" } } },\n  { $sort: { totalSales: -1 } },\n  { $limit: 5 },\n  { $project: { _id: 0, product: \"$_id\", totalSales: 1 } }\n])\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u9996\u5148\u4f7f\u7528$match\u9636\u6bb5\u7b5b\u9009\u51fa\u65e5\u671f\u57282022\u5e741\u67081\u65e5\u81f32022\u5e742\u67081\u65e5\u671f\u95f4\u7684\u9500\u552e\u8bb0\u5f55\u3002\u7136\u540e\u4f7f\u7528$group\u9636\u6bb5\u6309\u7167\u4ea7\u54c1\u5bf9\u9500\u552e\u8bb0\u5f55\u8fdb\u884c\u5206\u7ec4\uff0c\u5e76\u8ba1\u7b97\u6bcf\u4e2a\u4ea7\u54c1\u7684\u603b\u9500\u91cf\u3002\u63a5\u4e0b\u6765\u4f7f\u7528$sort\u9636\u6bb5\u6309\u7167\u603b\u9500\u91cf\u8fdb\u884c\u964d\u5e8f\u6392\u5e8f\uff0c\u518d\u4f7f\u7528$limit\u9636\u6bb5\u9650\u5236\u8fd4\u56de\u7ed3\u679c\u7684\u6570\u91cf\u4e3a5\u6761\u3002\u6700\u540e\u4f7f\u7528$project\u9636\u6bb5\u9009\u62e9\u9700\u8981\u8fd4\u56de\u7684\u5b57\u6bb5\uff0c\u5e76\u5c06_id\u5b57\u6bb5\u91cd\u547d\u540d\u4e3aproduct\u3002<\/p>\n<h2 id=\"%e6%80%bb%e7%bb%93-AwMwYerCsc\">\u603b\u7ed3<\/h2>\n<p>\u901a\u8fc7\u4f7f\u7528MongoDB\u7684\u805a\u5408\u64cd\u4f5c\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u66f4\u7075\u6d3b\u5730\u5904\u7406\u548c\u5206\u6790\u5927\u91cf\u7684\u6570\u636e\u3002\u805a\u5408\u7ba1\u9053\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u9636\u6bb5\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u8fdb\u884c\u7ec4\u5408\u548c\u8c03\u6574\uff0c\u4ee5\u5b9e\u73b0\u590d\u6742\u7684\u6570\u636e\u5904\u7406\u903b\u8f91\u3002\u5982\u679c\u60a8\u6b63\u5728\u5904\u7406\u5927\u6570\u636e\u91cf\u7684MongoDB\u96c6\u5408\uff0c\u805a\u5408\u64cd\u4f5c\u5c06\u662f\u60a8\u7684\u6709\u529b\u5de5\u5177\u3002<\/p>\n<h3 id=\"%e9%a6%99%e6%b8%af%e6%9c%8d%e5%8a%a1%e5%99%a8%e9%a6%96%e9%80%89%e5%90%8e%e6%b5%aa%e4%ba%91-AwMwYerCsc\">\u9999\u6e2f\u670d\u52a1\u5668\u9996\u9009\u540e\u6d6a\u4e91<\/h3>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u53ef\u9760\u7684\u9999\u6e2f\u670d\u52a1\u5668\u63d0\u4f9b\u5546\uff0c\u540e\u6d6a\u4e91\u662f\u60a8\u7684\u9996\u9009\u3002\u6211\u4eec\u63d0\u4f9b\u9ad8\u6027\u80fd\u7684\u9999\u6e2f\u670d\u52a1\u5668\uff0c\u53ef\u6ee1\u8db3\u60a8\u7684\u5404\u79cd\u9700\u6c42\u3002\u8bf7\u8bbf\u95ee\u6211\u4eec\u7684\u5b98\u7f51\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff1a<a href=\"https:\/\/idc.net\">https:\/\/idc.net<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB \u672f\u8bed - \u805a\u5408 MongoDB \u672f\u8bed - \u805a\u5408 \u5728MongoDB\u4e2d\uff0c\u805a\u5408\u662f\u4e00\u79cd\u6570\u636e\u5904\u7406\u64cd\u4f5c\uff0c\u7528 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7038],"tags":[],"class_list":["post-247335","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/247335","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=247335"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/247335\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=247335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=247335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=247335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}