{"id":247332,"date":"2024-01-02T20:34:20","date_gmt":"2024-01-02T12:34:20","guid":{"rendered":"https:\/\/www.idc.net\/help\/247332\/"},"modified":"2024-01-02T20:34:20","modified_gmt":"2024-01-02T12:34:20","slug":"mongodb-%e6%9c%af%e8%af%ad-%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/247332\/","title":{"rendered":"MongoDB \u672f\u8bed &#8211; \u67e5\u8be2"},"content":{"rendered":"<p><title id=\"mongodb-%e6%9c%af%e8%af%ad-%e6%9f%a5%e8%af%a2-kMzIZsMiRM\">MongoDB \u672f\u8bed - \u67e5\u8be2<\/title><\/p>\n<h1 id=\"mongodb-%e6%9c%af%e8%af%ad-%e6%9f%a5%e8%af%a2-kMzIZsMiRM\">MongoDB \u672f\u8bed - \u67e5\u8be2<\/h1>\n<h2 id=\"%e6%a6%82%e8%bf%b0-kMzIZsMiRM\">\u6982\u8ff0<\/h2>\n<p>MongoDB \u662f\u4e00\u79cd\u6d41\u884c\u7684\u5f00\u6e90\u6587\u6863\u6570\u636e\u5e93\uff0c\u5e7f\u6cdb\u7528\u4e8e\u73b0\u4ee3\u5e94\u7528\u7a0b\u5e8f\u7684\u6570\u636e\u5b58\u50a8\u548c\u68c0\u7d22\u3002\u5728 MongoDB \u4e2d\uff0c\u67e5\u8be2\u662f\u4e00\u79cd\u7528\u4e8e\u4ece\u96c6\u5408\u4e2d\u68c0\u7d22\u6570\u636e\u7684\u64cd\u4f5c\u3002\u672c\u6587\u5c06\u4ecb\u7ecd MongoDB \u4e2d\u5e38\u7528\u7684\u67e5\u8be2\u672f\u8bed\u548c\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e6%9f%a5%e8%af%a2-kMzIZsMiRM\">\u57fa\u672c\u67e5\u8be2<\/h2>\n<p>\u5728 MongoDB \u4e2d\uff0c\u57fa\u672c\u67e5\u8be2\u4f7f\u7528 <code>find()<\/code> \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u67e5\u8be2\u6761\u4ef6\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u6ee1\u8db3\u6761\u4ef6\u7684\u6587\u6863\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u67e5\u8be2\u5c06\u8fd4\u56de\u96c6\u5408\u4e2d\u6240\u6709\u5e74\u9f84\u5927\u4e8e\u7b49\u4e8e 18 \u5c81\u7684\u7528\u6237\uff1a<\/p>\n<pre><code>db.users.find({ age: { $gte: 18 } })<\/code><\/pre>\n<h2 id=\"%e6%8a%95%e5%bd%b1-kMzIZsMiRM\">\u6295\u5f71<\/h2>\n<p>\u5728\u67e5\u8be2\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u6295\u5f71\u64cd\u4f5c\u7b26\u6765\u6307\u5b9a\u8981\u8fd4\u56de\u7684\u5b57\u6bb5\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c<code>find()<\/code> \u65b9\u6cd5\u8fd4\u56de\u6240\u6709\u5b57\u6bb5\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u67e5\u8be2\u5c06\u53ea\u8fd4\u56de\u7528\u6237\u7684\u59d3\u540d\u548c\u7535\u5b50\u90ae\u4ef6\u5b57\u6bb5\uff1a<\/p>\n<pre><code>db.users.find({}, { name: 1, email: 1 })<\/code><\/pre>\n<h2 id=\"%e6%9d%a1%e4%bb%b6%e6%9f%a5%e8%af%a2-kMzIZsMiRM\">\u6761\u4ef6\u67e5\u8be2<\/h2>\n<p>MongoDB \u652f\u6301\u591a\u79cd\u6761\u4ef6\u67e5\u8be2\u64cd\u4f5c\u7b26\uff0c\u7528\u4e8e\u5728\u67e5\u8be2\u4e2d\u6307\u5b9a\u6761\u4ef6\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u67e5\u8be2\u5c06\u8fd4\u56de\u96c6\u5408\u4e2d\u6240\u6709\u59d3\u6c0f\u4e3a \"\u5f20\" \u7684\u7528\u6237\uff1a<\/p>\n<pre><code>db.users.find({ lastName: \"\u5f20\" })<\/code><\/pre>\n<h2 id=\"%e6%8e%92%e5%ba%8f-kMzIZsMiRM\">\u6392\u5e8f<\/h2>\n<p>\u53ef\u4ee5\u4f7f\u7528 <code>sort()<\/code> \u65b9\u6cd5\u5bf9\u67e5\u8be2\u7ed3\u679c\u8fdb\u884c\u6392\u5e8f\u3002\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u6392\u5e8f\u89c4\u5219\u4f5c\u4e3a\u53c2\u6570\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u67e5\u8be2\u5c06\u8fd4\u56de\u96c6\u5408\u4e2d\u5e74\u9f84\u6700\u5927\u7684\u524d 10 \u4e2a\u7528\u6237\uff1a<\/p>\n<pre><code>db.users.find().sort({ age: -1 }).limit(10)<\/code><\/pre>\n<h2 id=\"%e5%88%86%e9%a1%b5-kMzIZsMiRM\">\u5206\u9875<\/h2>\n<p>\u53ef\u4ee5\u4f7f\u7528 <code>skip()<\/code> \u548c <code>limit()<\/code> \u65b9\u6cd5\u8fdb\u884c\u5206\u9875\u67e5\u8be2\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u67e5\u8be2\u5c06\u8fd4\u56de\u96c6\u5408\u4e2d\u7684\u7b2c 11 \u5230 20 \u6761\u8bb0\u5f55\uff1a<\/p>\n<pre><code>db.users.find().skip(10).limit(10)<\/code><\/pre>\n<h2 id=\"%e7%b4%a2%e5%bc%95-kMzIZsMiRM\">\u7d22\u5f15<\/h2>\n<p>\u4e3a\u4e86\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\uff0c\u53ef\u4ee5\u5728\u96c6\u5408\u4e2d\u521b\u5efa\u7d22\u5f15\u3002\u7d22\u5f15\u53ef\u4ee5\u52a0\u5feb\u67e5\u8be2\u901f\u5ea6\uff0c\u5e76\u5141\u8bb8\u66f4\u9ad8\u6548\u5730\u6267\u884c\u6392\u5e8f\u548c\u5206\u9875\u64cd\u4f5c\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u547d\u4ee4\u5c06\u5728\u540d\u4e3a \"users\" \u7684\u96c6\u5408\u4e0a\u521b\u5efa\u4e00\u4e2a\u57fa\u4e8e \"age\" \u5b57\u6bb5\u7684\u7d22\u5f15\uff1a<\/p>\n<pre><code>db.users.createIndex({ age: 1 })<\/code><\/pre>\n<h2 id=\"%e6%80%bb%e7%bb%93-kMzIZsMiRM\">\u603b\u7ed3<\/h2>\n<p>\u672c\u6587\u4ecb\u7ecd\u4e86 MongoDB \u4e2d\u5e38\u7528\u7684\u67e5\u8be2\u672f\u8bed\u548c\u64cd\u4f5c\u3002\u4e86\u89e3\u8fd9\u4e9b\u672f\u8bed\u548c\u64cd\u4f5c\u5c06\u5e2e\u52a9\u60a8\u66f4\u597d\u5730\u4f7f\u7528 MongoDB \u8fdb\u884c\u6570\u636e\u5b58\u50a8\u548c\u68c0\u7d22\u3002<\/p>\n<h3 id=\"%e9%a6%99%e6%b8%af%e6%9c%8d%e5%8a%a1%e5%99%a8%e9%a6%96%e9%80%89%e5%90%8e%e6%b5%aa%e4%ba%91-kMzIZsMiRM\">\u9999\u6e2f\u670d\u52a1\u5668\u9996\u9009\u540e\u6d6a\u4e91<\/h3>\n<p>\u540e\u6d6a\u4e91\u662f\u4e00\u5bb6\u63d0\u4f9b\u9999\u6e2f\u670d\u52a1\u5668\u7684\u4e91\u8ba1\u7b97\u516c\u53f8\u3002\u6211\u4eec\u63d0\u4f9b\u9ad8\u6027\u80fd\u7684\u9999\u6e2f\u670d\u52a1\u5668\uff0c\u53ef\u6ee1\u8db3\u5404\u79cd\u5e94\u7528\u7a0b\u5e8f\u7684\u9700\u6c42\u3002\u8bf7\u8bbf\u95ee\u6211\u4eec\u7684\u5b98\u7f51\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff1a<a href=\"https:\/\/idc.net\">https:\/\/idc.net<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB \u672f\u8bed - \u67e5\u8be2 MongoDB \u672f\u8bed - \u67e5\u8be2 \u6982\u8ff0 MongoDB \u662f\u4e00\u79cd\u6d41\u884c\u7684\u5f00\u6e90\u6587\u6863\u6570\u636e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7038],"tags":[],"class_list":["post-247332","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/247332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=247332"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/247332\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=247332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=247332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=247332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}