{"id":63768,"date":"2024-10-14T02:19:16","date_gmt":"2024-10-13T18:19:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/63768\/"},"modified":"2024-10-14T02:19:16","modified_gmt":"2024-10-13T18:19:16","slug":"mongodb%e8%a1%93%e8%aa%9e-%e6%8e%92%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/63768\/","title":{"rendered":"MongoDB\u8853\u8a9e – \u6392\u5e8f"},"content":{"rendered":"

MongoDB\u8853\u8a9e – \u6392\u5e8f<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6392\u5e8f\u662f\u4e00\u500b\u91cd\u8981\u7684\u64cd\u4f5c\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002MongoDB\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684NoSQL\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u6392\u5e8f\u529f\u80fd\uff0c\u5e6b\u52a9\u7528\u6236\u9ad8\u6548\u5730\u6aa2\u7d22\u548c\u7ba1\u7406\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMongoDB\u4e2d\u7684\u6392\u5e8f\u8853\u8a9e\u53ca\u5176\u61c9\u7528\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u6392\u5e8f\uff1f<\/h2>\n

\u6392\u5e8f\u662f\u6307\u6839\u64da\u7279\u5b9a\u7684\u5b57\u6bb5\u5c0d\u6578\u64da\u9032\u884c\u6392\u5217\u7684\u904e\u7a0b\u3002\u5728MongoDB\u4e2d\uff0c\u6392\u5e8f\u53ef\u4ee5\u57fa\u65bc\u4e00\u500b\u6216\u591a\u500b\u5b57\u6bb5\u9032\u884c\uff0c\u4e26\u4e14\u53ef\u4ee5\u9078\u64c7\u5347\u5e8f\u6216\u964d\u5e8f\u6392\u5217\u3002\u9019\u5c0d\u65bc\u67e5\u8a62\u7d50\u679c\u7684\u53ef\u8b80\u6027\u548c\u6578\u64da\u5206\u6790\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n

MongoDB\u4e2d\u7684\u6392\u5e8f\u64cd\u4f5c<\/h2>\n

\u5728MongoDB\u4e2d\uff0c\u6392\u5e8f\u64cd\u4f5c\u4e3b\u8981\u901a\u904efind()<\/strong>\u65b9\u6cd5\u7d50\u5408sort()<\/strong>\u65b9\u6cd5\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u57fa\u672c\u7684\u8a9e\u6cd5\uff1a<\/p>\n

db.collection.find().sort({ field: 1 })  \/\/ \u5347\u5e8f\ndb.collection.find().sort({ field: -1 }) \/\/ \u964d\u5e8f\n<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u4ee3\u78bc\u4e2d\uff0cfield<\/code>\u662f\u9700\u8981\u6392\u5e8f\u7684\u5b57\u6bb5\uff0c1<\/code>\u8868\u793a\u5347\u5e8f\uff0c-1<\/code>\u8868\u793a\u964d\u5e8f\u3002<\/p>\n
\u7bc4\u4f8b<\/h3>\n
\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70bastudents<\/strong>\u7684\u96c6\u5408\uff0c\u5305\u542b\u5b78\u751f\u7684\u59d3\u540d\u548c\u6210\u7e3e\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u6839\u64da\u6210\u7e3e\u9032\u884c\u6392\u5e8f\u7684\u7bc4\u4f8b\uff1a<\/p>\n
db.students.find().sort({ score: -1 }) \/\/ \u6839\u64da\u6210\u7e3e\u964d\u5e8f\u6392\u5217\n<\/code><\/pre>\n
\u9019\u5c07\u8fd4\u56de\u6240\u6709\u5b78\u751f\u7684\u8cc7\u6599\uff0c\u4e26\u6839\u64da\u4ed6\u5011\u7684\u6210\u7e3e\u5f9e\u9ad8\u5230\u4f4e\u9032\u884c\u6392\u5217\u3002<\/p>\n
\u591a\u5b57\u6bb5\u6392\u5e8f<\/h2>\n
MongoDB\u9084\u652f\u6301\u6839\u64da\u591a\u500b\u5b57\u6bb5\u9032\u884c\u6392\u5e8f\u3002\u9019\u5728\u9700\u8981\u6839\u64da\u591a\u500b\u689d\u4ef6\u9032\u884c\u6392\u5e8f\u6642\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u5e0c\u671b\u6839\u64da\u6210\u7e3e\u964d\u5e8f\u6392\u5217\uff0c\u4e26\u5728\u6210\u7e3e\u76f8\u540c\u7684\u60c5\u6cc1\u4e0b\u6839\u64da\u59d3\u540d\u5347\u5e8f\u6392\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\uff1a<\/p>\n
db.students.find().sort({ score: -1, name: 1 })\n<\/code><\/pre>\n
\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u9996\u5148\u6839\u64da\u6210\u7e3e\u9032\u884c\u6392\u5e8f\uff0c\u7136\u5f8c\u5728\u6210\u7e3e\u76f8\u540c\u7684\u60c5\u6cc1\u4e0b\u6839\u64da\u59d3\u540d\u9032\u884c\u6392\u5e8f\u3002<\/p>\n
\u6027\u80fd\u8003\u91cf<\/h2>\n
\u5728\u4f7f\u7528\u6392\u5e8f\u64cd\u4f5c\u6642\uff0c\u6027\u80fd\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u6392\u5e8f\u64cd\u4f5c\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u70ba\u4e86\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u5efa\u8b70\u5c0d\u7d93\u5e38\u7528\u65bc\u6392\u5e8f\u7684\u5b57\u6bb5\u5efa\u7acb\u7d22\u5f15\u3002\u9019\u6a23\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002<\/p>\n
\u5efa\u7acb\u7d22\u5f15\u7684\u7bc4\u4f8b<\/h3>\n
\u4ee5\u4e0b\u662f\u5982\u4f55\u70bascore<\/strong>\u5b57\u6bb5\u5efa\u7acb\u7d22\u5f15\u7684\u7bc4\u4f8b\uff1a<\/p>\n
db.students.createIndex({ score: 1 })\n<\/code><\/pre>\n
\u9019\u6a23\u5728\u9032\u884c\u6392\u5e8f\u6642\uff0cMongoDB\u5c07\u5229\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u6392\u5e8f\u662fMongoDB\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u529f\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u66f4\u6709\u6548\u5730\u6aa2\u7d22\u548c\u5206\u6790\u6578\u64da\u3002\u901a\u904e\u9748\u6d3b\u7684\u6392\u5e8f\u64cd\u4f5c\u548c\u9069\u7576\u7684\u7d22\u5f15\u8a2d\u7f6e\uff0c\u7528\u6236\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u67e5\u8a62\u7684\u6548\u7387\u3002\u4e86\u89e3\u5982\u4f55\u5728MongoDB\u4e2d\u4f7f\u7528\u6392\u5e8f\uff0c\u5c0d\u65bc\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n
\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dcVPS\u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 Server.HK<\/a>\uff0c\u6211\u5011\u63d0\u4f9b\u5404\u7a2e\u89e3\u6c7a\u65b9\u6848\uff0c\u5305\u62ec \u9999\u6e2fVPS<\/a> \u548c \u4e91\u670d\u52a1\u5668<\/a> \u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3MongoDB\u4e2d\u7684\u6392\u5e8f\u8853\u8a9e\uff0c\u638c\u63e1\u5982\u4f55\u6709\u6548\u5730\u5c0d\u6578\u64da\u9032\u884c\u6392\u5e8f\u4ee5\u63d0\u5347\u67e5\u8a62\u6027\u80fd\u548c\u7d50\u679c\u53ef\u8b80\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-63768","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63768","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=63768"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63768\/revisions"}],"predecessor-version":[{"id":63769,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63768\/revisions\/63769"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=63768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=63768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=63768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}