{"id":181380,"date":"2024-11-09T16:34:18","date_gmt":"2024-11-09T08:34:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/181380\/"},"modified":"2024-11-09T16:34:19","modified_gmt":"2024-11-09T08:34:19","slug":"%e6%b7%b1%e5%85%a5%e6%b7%ba%e5%87%ba%ef%bc%9a%e5%ad%b8%e7%bf%92mongodb%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e6%8a%80%e5%b7%a7%ef%bc%88mongodb%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/181380\/","title":{"rendered":"\u6df1\u5165\u6dfa\u51fa\uff1a\u5b78\u7fd2MongoDB\u6578\u64da\u5eab\u67e5\u8a62\u6280\u5de7\uff08mongodb\u6578\u64da\u5eab\u67e5\u8a62\uff09"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e6%b7%ba%e5%87%ba%ef%bc%9a%e5%ad%b8%e7%bf%92mongodb%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e6%8a%80%e5%b7%a7-bEMAtkRyJn\">\u6df1\u5165\u6dfa\u51fa\uff1a\u5b78\u7fd2MongoDB\u6578\u64da\u5eab\u67e5\u8a62\u6280\u5de7<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cMongoDB\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684NoSQL\u6578\u64da\u5eab\uff0c\u56e0\u5176\u9748\u6d3b\u6027\u548c\u53ef\u64f4\u5c55\u6027\u800c\u53d7\u5230\u5ee3\u6cdb\u4f7f\u7528\u3002\u7121\u8ad6\u662f\u521d\u5b78\u8005\u9084\u662f\u6709\u7d93\u9a57\u7684\u958b\u767c\u8005\uff0c\u638c\u63e1MongoDB\u7684\u67e5\u8a62\u6280\u5de7\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMongoDB\u7684\u67e5\u8a62\u8a9e\u6cd5\u53ca\u5176\u61c9\u7528\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u6709\u6548\u5730\u64cd\u4f5c\u6578\u64da\u3002<\/p>\n<h2 id=\"mongodb%e6%9f%a5%e8%a9%a2%e5%9f%ba%e7%a4%8e-bEMAtkRyJn\">MongoDB\u67e5\u8a62\u57fa\u790e<\/h2>\n<p>MongoDB\u4f7f\u7528\u6587\u6a94\u5c0e\u5411\u7684\u6578\u64da\u6a21\u578b\uff0c\u6578\u64da\u4ee5BSON\u683c\u5f0f\u5b58\u5132\u3002\u67e5\u8a62MongoDB\u6578\u64da\u5eab\u7684\u57fa\u672c\u65b9\u6cd5\u662f\u4f7f\u7528<strong>find()<\/strong>\u65b9\u6cd5\u3002\u9019\u500b\u65b9\u6cd5\u53ef\u4ee5\u7528\u4f86\u6aa2\u7d22\u96c6\u5408\u4e2d\u7684\u6587\u6a94\u3002<\/p>\n<pre><code>db.collection.find(query, projection)<\/code><\/pre>\n<ul>\n<li><strong>query<\/strong>\uff1a\u7528\u65bc\u6307\u5b9a\u67e5\u8a62\u689d\u4ef6\u7684\u5c0d\u8c61\u3002<\/li>\n<li><strong>projection<\/strong>\uff1a\u7528\u65bc\u6307\u5b9a\u8fd4\u56de\u6587\u6a94\u4e2d\u54ea\u4e9b\u5b57\u6bb5\u7684\u5c0d\u8c61\u3002<\/li>\n<\/ul>\n<h3 id=\"%e5%9f%ba%e6%9c%ac%e6%9f%a5%e8%a9%a2%e7%a4%ba%e4%be%8b-bEMAtkRyJn\">\u57fa\u672c\u67e5\u8a62\u793a\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<strong>users<\/strong>\u7684\u96c6\u5408\uff0c\u5305\u542b\u7528\u6236\u7684\u57fa\u672c\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u67e5\u8a62\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\/\/ \u67e5\u8a62\u6240\u6709\u7528\u6236\ndb.users.find()\n\n\/\/ \u67e5\u8a62\u7279\u5b9a\u689d\u4ef6\u7684\u7528\u6236\ndb.users.find({ age: { $gt: 18 } })\n\n\/\/ \u67e5\u8a62\u4e26\u53ea\u8fd4\u56de\u7279\u5b9a\u5b57\u6bb5\ndb.users.find({ age: { $gt: 18 } }, { name: 1, email: 1 })\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e9%81%8b%e7%ae%97%e7%ac%a6%e9%80%b2%e8%a1%8c%e8%a4%87%e9%9b%9c%e6%9f%a5%e8%a9%a2-bEMAtkRyJn\">\u4f7f\u7528\u904b\u7b97\u7b26\u9032\u884c\u8907\u96dc\u67e5\u8a62<\/h2>\n<p>MongoDB\u652f\u6301\u591a\u7a2e\u67e5\u8a62\u904b\u7b97\u7b26\uff0c\u9019\u4f7f\u5f97\u67e5\u8a62\u66f4\u52a0\u9748\u6d3b\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u904b\u7b97\u7b26\uff1a<\/p>\n<ul>\n<li><strong>$eq<\/strong>\uff1a\u7b49\u65bc<\/li>\n<li><strong>$ne<\/strong>\uff1a\u4e0d\u7b49\u65bc<\/li>\n<li><strong>$gt<\/strong>\uff1a\u5927\u65bc<\/li>\n<li><strong>$lt<\/strong>\uff1a\u5c0f\u65bc<\/li>\n<li><strong>$in<\/strong>\uff1a\u5728\u6307\u5b9a\u7684\u6578\u7d44\u4e2d<\/li>\n<\/ul>\n<h3 id=\"%e8%a4%87%e9%9b%9c%e6%9f%a5%e8%a9%a2%e7%a4%ba%e4%be%8b-bEMAtkRyJn\">\u8907\u96dc\u67e5\u8a62\u793a\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528\u904b\u7b97\u7b26\u9032\u884c\u8907\u96dc\u67e5\u8a62\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\/\/ \u67e5\u8a62\u5e74\u9f61\u5927\u65bc18\u4e14\u6027\u5225\u70ba\u7537\u6027\u7684\u7528\u6236\ndb.users.find({ age: { $gt: 18 }, gender: \"male\" })\n\n\/\/ \u67e5\u8a62\u5e74\u9f61\u572818\u523030\u4e4b\u9593\u7684\u7528\u6236\ndb.users.find({ age: { $gte: 18, $lte: 30 } })\n\n\/\/ \u67e5\u8a62\u7528\u6236\u540d\u5728\u7279\u5b9a\u6578\u7d44\u4e2d\u7684\u7528\u6236\ndb.users.find({ username: { $in: [\"alice\", \"bob\", \"charlie\"] } })\n<\/code><\/pre>\n<h2 id=\"%e6%8e%92%e5%ba%8f%e5%92%8c%e9%99%90%e5%88%b6%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c-bEMAtkRyJn\">\u6392\u5e8f\u548c\u9650\u5236\u67e5\u8a62\u7d50\u679c<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528<strong>sort()<\/strong>\u548c<strong>limit()<\/strong>\u65b9\u6cd5\u4f86\u63a7\u5236\u67e5\u8a62\u7d50\u679c\u7684\u6392\u5e8f\u548c\u6578\u91cf\u3002<\/p>\n<pre><code>\/\/ \u6309\u5e74\u9f61\u5347\u5e8f\u6392\u5e8f\ndb.users.find().sort({ age: 1 })\n\n\/\/ \u9650\u5236\u8fd4\u56de\u7684\u7d50\u679c\u6578\u91cf\ndb.users.find().limit(5)\n<\/code><\/pre>\n<h3 id=\"%e7%b5%90%e5%90%88%e6%8e%92%e5%ba%8f%e5%92%8c%e9%99%90%e5%88%b6-bEMAtkRyJn\">\u7d50\u5408\u6392\u5e8f\u548c\u9650\u5236<\/h3>\n<p>\u53ef\u4ee5\u5c07\u6392\u5e8f\u548c\u9650\u5236\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u7372\u53d6\u7279\u5b9a\u7684\u67e5\u8a62\u7d50\u679c\uff1a<\/p>\n<pre><code>\/\/ \u67e5\u8a62\u5e74\u9f61\u5927\u65bc18\u7684\u7528\u6236\uff0c\u6309\u5e74\u9f61\u5347\u5e8f\u6392\u5e8f\uff0c\u4e26\u9650\u5236\u8fd4\u56de5\u500b\u7d50\u679c\ndb.users.find({ age: { $gt: 18 } }).sort({ age: 1 }).limit(5)\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-bEMAtkRyJn\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1MongoDB\u7684\u67e5\u8a62\u6280\u5de7\u5c0d\u65bc\u6578\u64da\u7ba1\u7406\u548c\u61c9\u7528\u958b\u767c\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u5b78\u7fd2\u57fa\u672c\u67e5\u8a62\u3001\u4f7f\u7528\u904b\u7b97\u7b26\u9032\u884c\u8907\u96dc\u67e5\u8a62\uff0c\u4ee5\u53ca\u63a7\u5236\u67e5\u8a62\u7d50\u679c\u7684\u6392\u5e8f\u548c\u9650\u5236\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u9ad8\u6548\u5730\u64cd\u4f5c\u6578\u64da\u3002\u96a8\u8457\u5c0dMongoDB\u7684\u6df1\u5165\u4e86\u89e3\uff0c\u60a8\u5c07\u80fd\u5920\u66f4\u9748\u6d3b\u5730\u8655\u7406\u5404\u7a2e\u6578\u64da\u9700\u6c42\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u90e8\u7f72\u60a8\u7684MongoDB\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u7a69\u5b9a\u548c\u5feb\u901f\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1MongoDB\u6578\u64da\u5eab\u67e5\u8a62\u6280\u5de7\uff0c\u6df1\u5165\u6dfa\u51fa\u5730\u5b78\u7fd2\u9ad8\u6548\u67e5\u8a62\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u80fd\u529b\uff0c\u52a9\u529b\u9805\u76ee\u6210\u529f\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-181380","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181380","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=181380"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181380\/revisions"}],"predecessor-version":[{"id":181381,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181380\/revisions\/181381"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=181380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=181380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=181380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}