{"id":175783,"date":"2024-11-08T08:57:17","date_gmt":"2024-11-08T00:57:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175783\/"},"modified":"2024-11-08T08:57:18","modified_gmt":"2024-11-08T00:57:18","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mongodb%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc-170-%e5%a4%aa%e5%a4%9a%e5%8c%b9%e9%85%8d%e7%9a%84%e6%96%87%e6%aa%94","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175783\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc &#8211; 170 &#8211; \u592a\u591a\u5339\u914d\u7684\u6587\u6a94"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mongodb%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc-170-%e5%a4%aa%e5%a4%9a%e5%8c%b9%e9%85%8d%e7%9a%84%e6%96%87%e6%aa%94-wErgTXkMex\">\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc &#8211; 170 &#8211; \u592a\u591a\u5339\u914d\u7684\u6587\u6a94<\/h1>\n<p>\u5728\u4f7f\u7528MongoDB\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa4\u4ee3\u78bc170\uff0c\u8a72\u932f\u8aa4\u901a\u5e38\u8868\u793a\u67e5\u8a62\u8fd4\u56de\u4e86\u904e\u591a\u7684\u5339\u914d\u6587\u6a94\u3002\u9019\u7a2e\u60c5\u6cc1\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\uff0c\u751a\u81f3\u4f7f\u61c9\u7528\u7a0b\u5e8f\u7121\u6cd5\u6b63\u5e38\u904b\u884c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u8a72\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc170%e7%9a%84%e5%8e%9f%e5%9b%a0-wErgTXkMex\">\u932f\u8aa4\u4ee3\u78bc170\u7684\u539f\u56e0<\/h2>\n<p>\u932f\u8aa4\u4ee3\u78bc170\u901a\u5e38\u51fa\u73fe\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u67e5\u8a62\u689d\u4ef6\u4e0d\u5920\u5177\u9ad4\uff1a<\/strong>\u7576\u67e5\u8a62\u689d\u4ef6\u904e\u65bc\u5bec\u6cdb\u6642\uff0cMongoDB\u53ef\u80fd\u6703\u8fd4\u56de\u5927\u91cf\u7684\u6587\u6a94\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u4e00\u500b\u6c92\u6709\u7d22\u5f15\u7684\u5b57\u6bb5\uff0c\u6216\u8005\u4f7f\u7528\u4e86\u4e0d\u5920\u5177\u9ad4\u7684\u7be9\u9078\u689d\u4ef6\u3002<\/li>\n<li><strong>\u6578\u64da\u91cf\u904e\u5927\uff1a<\/strong>\u5982\u679c\u6578\u64da\u5eab\u4e2d\u5b58\u5132\u4e86\u5927\u91cf\u7684\u6587\u6a94\uff0c\u4e14\u67e5\u8a62\u672a\u80fd\u6709\u6548\u9650\u5236\u8fd4\u56de\u7684\u7d50\u679c\u96c6\uff0c\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u672a\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\u5728MongoDB\u4e2d\uff0c\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u5982\u679c\u67e5\u8a62\u672a\u4f7f\u7528\u7d22\u5f15\uff0c\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u5168\u8868\u6383\u63cf\uff0c\u5f9e\u800c\u8fd4\u56de\u904e\u591a\u7684\u6587\u6a94\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc170-wErgTXkMex\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc170<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7a\u932f\u8aa4\u4ee3\u78bc170\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e6%a2%9d%e4%bb%b6-wErgTXkMex\">1. \u512a\u5316\u67e5\u8a62\u689d\u4ef6<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u67e5\u8a62\u689d\u4ef6\u662f\u5426\u904e\u65bc\u5bec\u6cdb\u3002\u53ef\u4ee5\u901a\u904e\u6dfb\u52a0\u66f4\u591a\u7684\u7be9\u9078\u689d\u4ef6\u4f86\u7e2e\u5c0f\u67e5\u8a62\u7bc4\u570d\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u7528\u6236\u96c6\u5408\uff0c\u60f3\u8981\u67e5\u8a62\u5e74\u9f61\u5927\u65bc30\u7684\u7528\u6236\uff1a<\/p>\n<pre><code>{\n    age: { $gt: 30 }\n}<\/code><\/pre>\n<p>\u5982\u679c\u9019\u500b\u67e5\u8a62\u8fd4\u56de\u4e86\u904e\u591a\u7684\u6587\u6a94\uff0c\u53ef\u4ee5\u8003\u616e\u9032\u4e00\u6b65\u6dfb\u52a0\u5176\u4ed6\u689d\u4ef6\uff0c\u4f8b\u5982\u6027\u5225\u6216\u5730\u5340\uff1a<\/p>\n<pre><code>{\n    age: { $gt: 30 },\n    gender: \"female\",\n    location: \"Hong Kong\"\n}<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95-wErgTXkMex\">2. \u4f7f\u7528\u7d22\u5f15<\/h3>\n<p>\u78ba\u4fdd\u67e5\u8a62\u4f7f\u7528\u4e86\u9069\u7576\u7684\u7d22\u5f15\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u547d\u4ee4\u67e5\u770b\u96c6\u5408\u7684\u7d22\u5f15\uff1a<\/p>\n<pre><code>db.collection.getIndexes()<\/code><\/pre>\n<p>\u5982\u679c\u767c\u73fe\u67e5\u8a62\u672a\u4f7f\u7528\u7d22\u5f15\uff0c\u53ef\u4ee5\u8003\u616e\u70ba\u67e5\u8a62\u5b57\u6bb5\u5275\u5efa\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u70ba\u5e74\u9f61\u5b57\u6bb5\u5275\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>db.collection.createIndex({ age: 1 })<\/code><\/pre>\n<h3 id=\"3-%e9%99%90%e5%88%b6%e8%bf%94%e5%9b%9e%e7%9a%84%e6%96%87%e6%aa%94%e6%95%b8%e9%87%8f-wErgTXkMex\">3. \u9650\u5236\u8fd4\u56de\u7684\u6587\u6a94\u6578\u91cf<\/h3>\n<p>\u5982\u679c\u67e5\u8a62\u4ecd\u7136\u8fd4\u56de\u904e\u591a\u7684\u6587\u6a94\uff0c\u53ef\u4ee5\u4f7f\u7528\u9650\u5236\uff08limit\uff09\u4f86\u63a7\u5236\u8fd4\u56de\u7684\u7d50\u679c\u6578\u91cf\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>db.collection.find({ age: { $gt: 30 } }).limit(100)<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u67e5\u8a62\u4e0d\u6703\u8fd4\u56de\u8d85\u904e100\u500b\u6587\u6a94\uff0c\u5f9e\u800c\u907f\u514d\u932f\u8aa4\u4ee3\u78bc170\u7684\u51fa\u73fe\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e8%81%9a%e5%90%88%e7%ae%a1%e9%81%93-wErgTXkMex\">4. \u4f7f\u7528\u805a\u5408\u7ba1\u9053<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u805a\u5408\u7ba1\u9053\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u8655\u7406\u6578\u64da\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u805a\u5408\u4f86\u8a08\u7b97\u5e74\u9f61\u5927\u65bc30\u7684\u7528\u6236\u6578\u91cf\uff1a<\/p>\n<pre><code>db.collection.aggregate([\n    { $match: { age: { $gt: 30 } } },\n    { $count: \"totalUsers\" }\n])<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wErgTXkMex\">\u7e3d\u7d50<\/h2>\n<p>\u932f\u8aa4\u4ee3\u78bc170\u901a\u5e38\u662f\u7531\u65bc\u67e5\u8a62\u8fd4\u56de\u4e86\u904e\u591a\u7684\u5339\u914d\u6587\u6a94\u6240\u5f15\u8d77\u7684\u3002\u901a\u904e\u512a\u5316\u67e5\u8a62\u689d\u4ef6\u3001\u4f7f\u7528\u7d22\u5f15\u3001\u9650\u5236\u8fd4\u56de\u7684\u6587\u6a94\u6578\u91cf\u4ee5\u53ca\u4f7f\u7528\u805a\u5408\u7ba1\u9053\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u9084\u80fd\u6539\u5584\u7528\u6236\u9ad4\u9a57\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\u904b\u884c\u60a8\u7684MongoDB\u6578\u64da\u5eab\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u548c\u64f4\u5c55\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc170\uff0c\u89e3\u6c7a\u201c\u592a\u591a\u5339\u914d\u7684\u6587\u6a94\u201d\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\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-175783","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175783","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=175783"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175783\/revisions"}],"predecessor-version":[{"id":175784,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175783\/revisions\/175784"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175783"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175783"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}