{"id":64098,"date":"2024-10-14T11:03:43","date_gmt":"2024-10-14T03:03:43","guid":{"rendered":"https:\/\/server.hk\/cnblog\/64098\/"},"modified":"2024-10-14T11:03:43","modified_gmt":"2024-10-14T03:03:43","slug":"mongodb%e4%b8%ad%e7%b4%a2%e5%bc%95%e7%9a%84%e5%89%b5%e5%bb%ba%e5%92%8c%e4%bd%bf%e7%94%a8%e8%a9%b3%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/64098\/","title":{"rendered":"MongoDB\u4e2d\u7d22\u5f15\u7684\u5275\u5efa\u548c\u4f7f\u7528\u8a73\u89e3"},"content":{"rendered":"<h1 id=\"mongodb%e4%b8%ad%e7%b4%a2%e5%bc%95%e7%9a%84%e5%89%b5%e5%bb%ba%e5%92%8c%e4%bd%bf%e7%94%a8%e8%a9%b3%e8%a7%a3-QvFmXUHikg\">MongoDB\u4e2d\u7d22\u5f15\u7684\u5275\u5efa\u548c\u4f7f\u7528\u8a73\u89e3<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\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\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u5de5\u5177\uff0c\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMongoDB\u4e2d\u7d22\u5f15\u7684\u5275\u5efa\u548c\u4f7f\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%b4%a2%e5%bc%95%ef%bc%9f-QvFmXUHikg\">\u4ec0\u9ebc\u662f\u7d22\u5f15\uff1f<\/h2>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u65e8\u5728\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u7684\u901f\u5ea6\u3002\u5b83\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u7684\u6578\u64da\u3002MongoDB\u652f\u6301\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u5305\u62ec\u55ae\u5b57\u6bb5\u7d22\u5f15\u3001\u8907\u5408\u7d22\u5f15\u3001\u5730\u7406\u7a7a\u9593\u7d22\u5f15\u7b49\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e7%b4%a2%e5%bc%95%ef%bc%9f-QvFmXUHikg\">\u70ba\u4ec0\u9ebc\u9700\u8981\u7d22\u5f15\uff1f<\/h2>\n<p>\u5728\u6c92\u6709\u7d22\u5f15\u7684\u60c5\u6cc1\u4e0b\uff0cMongoDB\u9700\u8981\u6383\u63cf\u6574\u500b\u96c6\u5408\u4f86\u67e5\u627e\u5339\u914d\u7684\u6587\u6a94\uff0c\u9019\u5728\u6578\u64da\u91cf\u5927\u6642\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u6642\u9593\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%89%b5%e5%bb%ba%e7%b4%a2%e5%bc%95-QvFmXUHikg\">\u5982\u4f55\u5275\u5efa\u7d22\u5f15<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c\u5275\u5efa\u7d22\u5f15\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>db.collection.createIndex({ field: 1 })<\/code><\/pre>\n<p>\u9019\u88e1\u7684`field`\u662f\u8981\u7d22\u5f15\u7684\u5b57\u6bb5\uff0c`1`\u8868\u793a\u5347\u5e8f\u7d22\u5f15\uff0c`-1`\u5247\u8868\u793a\u964d\u5e8f\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u5728`users`\u96c6\u5408\u7684`username`\u5b57\u6bb5\u4e0a\u5275\u5efa\u5347\u5e8f\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>db.users.createIndex({ username: 1 })<\/code><\/pre>\n<h3 id=\"%e8%a4%87%e5%90%88%e7%b4%a2%e5%bc%95-QvFmXUHikg\">\u8907\u5408\u7d22\u5f15<\/h3>\n<p>\u8907\u5408\u7d22\u5f15\u662f\u6307\u5728\u591a\u500b\u5b57\u6bb5\u4e0a\u5275\u5efa\u7684\u7d22\u5f15\u3002\u9019\u5c0d\u65bc\u9700\u8981\u540c\u6642\u67e5\u8a62\u591a\u500b\u5b57\u6bb5\u7684\u60c5\u6cc1\u7279\u5225\u6709\u7528\u3002\u5275\u5efa\u8907\u5408\u7d22\u5f15\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>db.collection.createIndex({ field1: 1, field2: -1 })<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5728`users`\u96c6\u5408\u7684`firstName`\u548c`lastName`\u5b57\u6bb5\u4e0a\u5275\u5efa\u8907\u5408\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>db.users.createIndex({ firstName: 1, lastName: -1 })<\/code><\/pre>\n<h3 id=\"%e5%94%af%e4%b8%80%e7%b4%a2%e5%bc%95-QvFmXUHikg\">\u552f\u4e00\u7d22\u5f15<\/h3>\n<p>\u552f\u4e00\u7d22\u5f15\u78ba\u4fdd\u7d22\u5f15\u5b57\u6bb5\u7684\u503c\u662f\u552f\u4e00\u7684\uff0c\u9019\u5c0d\u65bc\u9700\u8981\u9632\u6b62\u91cd\u8907\u6578\u64da\u7684\u60c5\u6cc1\u975e\u5e38\u6709\u7528\u3002\u5275\u5efa\u552f\u4e00\u7d22\u5f15\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>db.collection.createIndex({ field: 1 }, { unique: true })<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5728`users`\u96c6\u5408\u7684`email`\u5b57\u6bb5\u4e0a\u5275\u5efa\u552f\u4e00\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>db.users.createIndex({ email: 1 }, { unique: true })<\/code><\/pre>\n<h2 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e4%bd%bf%e7%94%a8-QvFmXUHikg\">\u7d22\u5f15\u7684\u4f7f\u7528<\/h2>\n<p>\u5275\u5efa\u7d22\u5f15\u5f8c\uff0cMongoDB\u6703\u81ea\u52d5\u4f7f\u7528\u5b83\u4f86\u512a\u5316\u67e5\u8a62\u3002\u7528\u6236\u53ef\u4ee5\u4f7f\u7528`explain()`\u65b9\u6cd5\u4f86\u67e5\u770b\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u9019\u6709\u52a9\u65bc\u4e86\u89e3\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u6cc1\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>db.users.find({ username: \"john\" }).explain(\"executionStats\")<\/code><\/pre>\n<p>\u9019\u5c07\u986f\u793a\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5305\u62ec\u662f\u5426\u4f7f\u7528\u4e86\u7d22\u5f15\u4ee5\u53ca\u67e5\u8a62\u7684\u6027\u80fd\u7d71\u8a08\u4fe1\u606f\u3002<\/p>\n<h2 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e7%ae%a1%e7%90%86-QvFmXUHikg\">\u7d22\u5f15\u7684\u7ba1\u7406<\/h2>\n<p>\u7528\u6236\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u67e5\u770b\u96c6\u5408\u4e2d\u7684\u6240\u6709\u7d22\u5f15\uff1a<\/p>\n<pre><code>db.collection.getIndexes()<\/code><\/pre>\n<p>\u82e5\u8981\u522a\u9664\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>db.collection.dropIndex(\"indexName\")<\/code><\/pre>\n<p>\u5176\u4e2d`indexName`\u662f\u8981\u522a\u9664\u7684\u7d22\u5f15\u540d\u7a31\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-QvFmXUHikg\">\u7e3d\u7d50<\/h2>\n<p>MongoDB\u4e2d\u7684\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u5de5\u5177\u3002\u901a\u904e\u5408\u7406\u5730\u5275\u5efa\u548c\u4f7f\u7528\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u7684\u6548\u7387\u3002\u5728\u9078\u64c7\u7d22\u5f15\u985e\u578b\u6642\uff0c\u61c9\u6839\u64da\u5177\u9ad4\u7684\u67e5\u8a62\u9700\u6c42\u9032\u884c\u8003\u91cf\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">VPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u89e3\u6c7a\u65b9\u6848\u5c07\u6709\u52a9\u65bc\u9032\u4e00\u6b65\u63d0\u5347\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0eMongoDB\u4e2d\u7d22\u5f15\u7684\u5275\u5efa\u8207\u4f7f\u7528\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u5b58\u53d6\uff0c\u52a9\u529b\u6578\u64da\u5eab\u6027\u80fd\u63d0\u5347\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-64098","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64098","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=64098"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64098\/revisions"}],"predecessor-version":[{"id":64099,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64098\/revisions\/64099"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=64098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=64098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=64098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}