{"id":63880,"date":"2024-10-14T03:15:17","date_gmt":"2024-10-13T19:15:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/63880\/"},"modified":"2024-10-14T03:15:17","modified_gmt":"2024-10-13T19:15:17","slug":"mongodb%e6%9f%a5%e8%a9%a2%e5%88%86%e9%a0%81%ef%bc%9a%e6%8f%90%e9%ab%98%e6%95%b8%e6%93%9a%e6%aa%a2%e7%b4%a2%e6%95%88%e7%8e%87%ef%bc%88mongodb%e6%9f%a5%e8%a9%a2%e5%88%86%e9%a0%81%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/63880\/","title":{"rendered":"Mongodb\u67e5\u8a62\u5206\u9801\uff1a\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u6548\u7387\uff08mongodb\u67e5\u8a62\u5206\u9801\uff09"},"content":{"rendered":"

MongoDB\u67e5\u8a62\u5206\u9801\uff1a\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u6548\u7387<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6548\u7387\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002MongoDB\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684NoSQL\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u6578\u64da\u6a21\u578b\u548c\u9ad8\u6548\u7684\u67e5\u8a62\u80fd\u529b\u3002\u7136\u800c\uff0c\u7576\u6578\u64da\u91cf\u589e\u9577\u6642\uff0c\u5982\u4f55\u6709\u6548\u5730\u9032\u884c\u67e5\u8a62\u5206\u9801\u6210\u70ba\u4e86\u4e00\u500b\u91cd\u8981\u7684\u8ab2\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0eMongoDB\u67e5\u8a62\u5206\u9801\u7684\u539f\u7406\u53ca\u5176\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u6548\u7387\u7684\u65b9\u6cd5\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u67e5\u8a62\u5206\u9801\uff1f<\/h2>\n

\u67e5\u8a62\u5206\u9801\u662f\u6307\u5c07\u67e5\u8a62\u7d50\u679c\u5206\u6210\u591a\u500b\u9801\u9762\uff0c\u4ee5\u4fbf\u7528\u6236\u53ef\u4ee5\u9010\u6b65\u67e5\u770b\u6578\u64da\u3002\u9019\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u7279\u5225\u6709\u7528\uff0c\u56e0\u70ba\u4e00\u6b21\u6027\u52a0\u8f09\u6240\u6709\u6578\u64da\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u548c\u7528\u6236\u9ad4\u9a57\u4e0d\u4f73\u3002MongoDB\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u67e5\u8a62\u5206\u9801\uff0c\u6700\u5e38\u898b\u7684\u6709\u4f7f\u7528skip\u548climit\u53c3\u6578\u3002<\/p>\n

\u4f7f\u7528skip\u548climit\u9032\u884c\u5206\u9801<\/h2>\n

\u5728MongoDB\u4e2d\uff0cskip<\/code>\u548climit<\/code>\u662f\u5169\u500b\u975e\u5e38\u6709\u7528\u7684\u67e5\u8a62\u53c3\u6578\u3002limit<\/code>\u7528\u65bc\u9650\u5236\u8fd4\u56de\u7684\u6587\u6a94\u6578\u91cf\uff0c\u800cskip<\/code>\u5247\u7528\u65bc\u8df3\u904e\u6307\u5b9a\u6578\u91cf\u7684\u6587\u6a94\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n

db.collection.find().skip(10).limit(5)<\/code><\/pre>\n
\u4e0a\u8ff0\u67e5\u8a62\u5c07\u8df3\u904e\u524d10\u500b\u6587\u6a94\uff0c\u4e26\u8fd4\u56de\u63a5\u4e0b\u4f86\u76845\u500b\u6587\u6a94\u3002\u9019\u7a2e\u65b9\u6cd5\u7c21\u55ae\u6613\u7528\uff0c\u4f46\u5728\u6578\u64da\u91cf\u8f03\u5927\u6642\uff0c\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\uff0c\u56e0\u70baMongoDB\u9700\u8981\u904d\u6b77\u6240\u6709\u8df3\u904e\u7684\u6587\u6a94\u3002<\/p>\n
\u6027\u80fd\u554f\u984c\u53ca\u89e3\u6c7a\u65b9\u6848<\/h2>\n
\u4f7f\u7528skip<\/code>\u548climit<\/code>\u9032\u884c\u5206\u9801\u6642\uff0c\u7576\u6578\u64da\u91cf\u589e\u9577\u6642\uff0c\u6027\u80fd\u6703\u9010\u6f38\u4e0b\u964d\u3002\u9019\u662f\u56e0\u70baMongoDB\u5728\u57f7\u884c\u67e5\u8a62\u6642\u9700\u8981\u8a08\u7b97\u8df3\u904e\u7684\u6587\u6a94\u6578\u91cf\uff0c\u9019\u6703\u5c0e\u81f4\u67e5\u8a62\u901f\u5ea6\u8b8a\u6162\u3002\u70ba\u4e86\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n
1. \u4f7f\u7528\u7bc4\u570d\u67e5\u8a62<\/h3>\n
\u7bc4\u570d\u67e5\u8a62\u662f\u4e00\u7a2e\u66f4\u9ad8\u6548\u7684\u5206\u9801\u65b9\u6cd5\u3002\u901a\u904e\u4f7f\u7528\u67d0\u500b\u5b57\u6bb5\u7684\u7bc4\u570d\u4f86\u9032\u884c\u67e5\u8a62\uff0c\u53ef\u4ee5\u907f\u514d\u4f7f\u7528skip<\/code>\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6709\u4e00\u500b\u6642\u9593\u6233\u5b57\u6bb5\uff0c\u53ef\u4ee5\u6839\u64da\u6642\u9593\u6233\u9032\u884c\u67e5\u8a62\uff1a<\/p>\n
db.collection.find({timestamp: {$gt: lastTimestamp}}).limit(5)<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u76f4\u63a5\u67e5\u8a62\u5927\u65bc\u4e0a\u4e00\u6b21\u67e5\u8a62\u7d50\u679c\u7684\u6642\u9593\u6233\u7684\u6587\u6a94\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n
2. \u4f7f\u7528\u6e38\u6a19<\/h3>\n
MongoDB\u7684\u6e38\u6a19\u53ef\u4ee5\u7528\u4f86\u5be6\u73fe\u66f4\u9ad8\u6548\u7684\u5206\u9801\u3002\u901a\u904e\u4fdd\u6301\u6e38\u6a19\u7684\u72c0\u614b\uff0c\u53ef\u4ee5\u5728\u591a\u6b21\u67e5\u8a62\u4e2d\u6301\u7e8c\u7372\u53d6\u6578\u64da\uff0c\u800c\u4e0d\u9700\u8981\u6bcf\u6b21\u90fd\u5f9e\u982d\u958b\u59cb\u67e5\u8a62\u3002<\/p>\n
const cursor = db.collection.find().sort({field: 1}).limit(5);<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u5728\u6bcf\u6b21\u67e5\u8a62\u4e2d\u6301\u7e8c\u4f7f\u7528\u6e38\u6a19\uff0c\u5f9e\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n
3. \u4f7f\u7528\u805a\u5408\u7ba1\u9053<\/h3>\n
MongoDB\u7684\u805a\u5408\u7ba1\u9053\u63d0\u4f9b\u4e86\u66f4\u5f37\u5927\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\uff0c\u53ef\u4ee5\u7528\u4f86\u5be6\u73fe\u8907\u96dc\u7684\u67e5\u8a62\u548c\u5206\u9801\u3002\u901a\u904e\u4f7f\u7528$skip<\/code>\u548c$limit<\/code>\u64cd\u4f5c\u7b26\uff0c\u53ef\u4ee5\u5728\u805a\u5408\u7ba1\u9053\u4e2d\u9032\u884c\u9ad8\u6548\u7684\u5206\u9801\u3002<\/p>\n
db.collection.aggregate([{$skip: 10}, {$limit: 5}]);<\/code><\/pre>\n
\u9019\u7a2e\u65b9\u6cd5\u5728\u8655\u7406\u8907\u96dc\u67e5\u8a62\u6642\u7279\u5225\u6709\u6548\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
MongoDB\u67e5\u8a62\u5206\u9801\u662f\u4e00\u500b\u91cd\u8981\u7684\u6280\u8853\uff0c\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u7684\u6548\u7387\u3002\u901a\u904e\u4f7f\u7528skip<\/code>\u548climit<\/code>\u3001\u7bc4\u570d\u67e5\u8a62\u3001\u6e38\u6a19\u4ee5\u53ca\u805a\u5408\u7ba1\u9053\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u5927\u91cf\u6578\u64da\u7684\u67e5\u8a62\u9700\u6c42\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u9078\u64c7\u5408\u9069\u7684\u5206\u9801\u7b56\u7565\u5c07\u5c0d\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u7522\u751f\u986f\u8457\u5f71\u97ff\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u6216\u4e91\u670d\u52a1\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684MongoDB\u61c9\u7528\u7a0b\u5e8f\uff0c\u78ba\u4fdd\u6578\u64da\u6aa2\u7d22\u7684\u9ad8\u6548\u6027\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22MongoDB\u67e5\u8a62\u5206\u9801\u6280\u8853\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u6548\u7387\uff0c\u512a\u5316\u6027\u80fd\uff0c\u8b93\u6578\u64da\u7ba1\u7406\u66f4\u9ad8\u6548\u4fbf\u6377\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-63880","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63880","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=63880"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63880\/revisions"}],"predecessor-version":[{"id":63881,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63880\/revisions\/63881"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=63880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=63880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=63880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}