{"id":63694,"date":"2024-10-14T01:41:15","date_gmt":"2024-10-13T17:41:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/63694\/"},"modified":"2024-10-14T01:41:15","modified_gmt":"2024-10-13T17:41:15","slug":"mongodb%e8%a1%93%e8%aa%9e-%e8%a1%a8%e9%81%94%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/63694\/","title":{"rendered":"MongoDB\u8853\u8a9e &#8211; \u8868\u9054\u5f0f"},"content":{"rendered":"<h1 id=\"mongodb%e8%a1%93%e8%aa%9e-%e8%a1%a8%e9%81%94%e5%bc%8f-PdGHgxMwhv\">MongoDB\u8853\u8a9e &#8211; \u8868\u9054\u5f0f<\/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\u5df2\u7d93\u6210\u70ba\u8a31\u591a\u958b\u767c\u8005\u548c\u4f01\u696d\u7684\u9996\u9078\u3002MongoDB\u7684\u9748\u6d3b\u6027\u548c\u53ef\u64f4\u5c55\u6027\u4f7f\u5176\u5728\u8655\u7406\u5927\u91cf\u975e\u7d50\u69cb\u5316\u6578\u64da\u6642\u8868\u73fe\u51fa\u8272\u3002\u5728MongoDB\u4e2d\uff0c\u8868\u9054\u5f0f\u662f\u7528\u4f86\u9032\u884c\u6578\u64da\u67e5\u8a62\u548c\u64cd\u4f5c\u7684\u91cd\u8981\u5de5\u5177\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMongoDB\u4e2d\u7684\u8868\u9054\u5f0f\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afmongodb%e8%a1%a8%e9%81%94%e5%bc%8f%ef%bc%9f-PdGHgxMwhv\">\u4ec0\u9ebc\u662fMongoDB\u8868\u9054\u5f0f\uff1f<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c\u8868\u9054\u5f0f\u662f\u7528\u4f86\u8a08\u7b97\u503c\u7684\u8a9e\u6cd5\u7d50\u69cb\u3002\u9019\u4e9b\u8868\u9054\u5f0f\u53ef\u4ee5\u7528\u65bc\u67e5\u8a62\u3001\u66f4\u65b0\u548c\u805a\u5408\u64cd\u4f5c\u3002MongoDB\u652f\u6301\u591a\u7a2e\u8868\u9054\u5f0f\uff0c\u5305\u62ec\u7b97\u8853\u8868\u9054\u5f0f\u3001\u6bd4\u8f03\u8868\u9054\u5f0f\u3001\u908f\u8f2f\u8868\u9054\u5f0f\u7b49\u3002\u9019\u4e9b\u8868\u9054\u5f0f\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u9748\u6d3b\u5730\u64cd\u4f5c\u6578\u64da\uff0c\u6eff\u8db3\u4e0d\u540c\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e7%9a%84mongodb%e8%a1%a8%e9%81%94%e5%bc%8f%e9%a1%9e%e5%9e%8b-PdGHgxMwhv\">\u5e38\u898b\u7684MongoDB\u8868\u9054\u5f0f\u985e\u578b<\/h2>\n<ul>\n<li><strong>\u7b97\u8853\u8868\u9054\u5f0f<\/strong>: \u7528\u65bc\u57f7\u884c\u6578\u5b78\u904b\u7b97\uff0c\u5982\u52a0\u6cd5\u3001\u6e1b\u6cd5\u3001\u4e58\u6cd5\u548c\u9664\u6cd5\u3002<\/li>\n<li><strong>\u6bd4\u8f03\u8868\u9054\u5f0f<\/strong>: \u7528\u65bc\u6bd4\u8f03\u5169\u500b\u503c\uff0c\u8fd4\u56de\u5e03\u723e\u503c\uff08true\u6216false\uff09\u3002\u4f8b\u5982\uff0c$eq\uff08\u7b49\u65bc\uff09\u3001$gt\uff08\u5927\u65bc\uff09\u3001$lt\uff08\u5c0f\u65bc\uff09\u7b49\u3002<\/li>\n<li><strong>\u908f\u8f2f\u8868\u9054\u5f0f<\/strong>: \u7528\u65bc\u7d44\u5408\u591a\u500b\u5e03\u723e\u8868\u9054\u5f0f\uff0c\u5e38\u7528\u7684\u6709$and\u3001$or\u548c$not\u3002<\/li>\n<li><strong>\u689d\u4ef6\u8868\u9054\u5f0f<\/strong>: \u4f7f\u7528$cond\u4f86\u6839\u64da\u689d\u4ef6\u8fd4\u56de\u4e0d\u540c\u7684\u503c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%ae%97%e8%a1%93%e8%a1%a8%e9%81%94%e5%bc%8f%e7%a4%ba%e4%be%8b-PdGHgxMwhv\">\u7b97\u8853\u8868\u9054\u5f0f\u793a\u4f8b<\/h2>\n<p>\u7b97\u8853\u8868\u9054\u5f0f\u53ef\u4ee5\u7528\u65bc\u66f4\u65b0\u6587\u6a94\u4e2d\u7684\u6578\u503c\u5b57\u6bb5\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cproducts\u201d\u7684\u96c6\u5408\uff0c\u4e26\u5e0c\u671b\u5c07\u6240\u6709\u7522\u54c1\u7684\u50f9\u683c\u589e\u52a010%\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\uff1a<\/p>\n<pre><code>\ndb.products.updateMany(\n    {},\n    { $inc: { price: 10 } }\n)\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c$inc\u64cd\u4f5c\u7b26\u7528\u65bc\u589e\u52a0price\u5b57\u6bb5\u7684\u503c\u3002<\/p>\n<h2 id=\"%e6%af%94%e8%bc%83%e8%a1%a8%e9%81%94%e5%bc%8f%e7%a4%ba%e4%be%8b-PdGHgxMwhv\">\u6bd4\u8f03\u8868\u9054\u5f0f\u793a\u4f8b<\/h2>\n<p>\u6bd4\u8f03\u8868\u9054\u5f0f\u901a\u5e38\u7528\u65bc\u67e5\u8a62\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u67e5\u627e\u6240\u6709\u50f9\u683c\u5927\u65bc100\u7684\u7522\u54c1\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>\ndb.products.find({ price: { $gt: 100 } })\n<\/code><\/pre>\n<p>\u9019\u88e1\uff0c$gt\u64cd\u4f5c\u7b26\u7528\u65bc\u67e5\u627e\u6240\u6709\u50f9\u683c\u5927\u65bc100\u7684\u7522\u54c1\u3002<\/p>\n<h2 id=\"%e9%82%8f%e8%bc%af%e8%a1%a8%e9%81%94%e5%bc%8f%e7%a4%ba%e4%be%8b-PdGHgxMwhv\">\u908f\u8f2f\u8868\u9054\u5f0f\u793a\u4f8b<\/h2>\n<p>\u908f\u8f2f\u8868\u9054\u5f0f\u53ef\u4ee5\u7528\u65bc\u7d44\u5408\u591a\u500b\u67e5\u8a62\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u67e5\u627e\u6240\u6709\u50f9\u683c\u572850\u5230150\u4e4b\u9593\u7684\u7522\u54c1\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>\ndb.products.find({\n    $and: [\n        { price: { $gt: 50 } },\n        { price: { $lt: 150 } }\n    ]\n})\n<\/code><\/pre>\n<h2 id=\"%e6%a2%9d%e4%bb%b6%e8%a1%a8%e9%81%94%e5%bc%8f%e7%a4%ba%e4%be%8b-PdGHgxMwhv\">\u689d\u4ef6\u8868\u9054\u5f0f\u793a\u4f8b<\/h2>\n<p>\u689d\u4ef6\u8868\u9054\u5f0f\u53ef\u4ee5\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u8fd4\u56de\u4e0d\u540c\u7684\u503c\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u8981\u5728\u67e5\u8a62\u4e2d\u6dfb\u52a0\u4e00\u500b\u5b57\u6bb5\uff0c\u6839\u64da\u7522\u54c1\u7684\u50f9\u683c\u4f86\u6a19\u8a18\u5176\u72c0\u614b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\uff1a<\/p>\n<pre><code>\ndb.products.aggregate([\n    {\n        $project: {\n            name: 1,\n            price: 1,\n            status: {\n                $cond: {\n                    if: { $gt: [\"$price\", 100] },\n                    then: \"Expensive\",\n                    else: \"Affordable\"\n                }\n            }\n        }\n    }\n])\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c$cond\u6839\u64da\u50f9\u683c\u7684\u503c\u8fd4\u56de\u201cExpensive\u201d\u6216\u201cAffordable\u201d\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-PdGHgxMwhv\">\u7e3d\u7d50<\/h2>\n<p>MongoDB\u7684\u8868\u9054\u5f0f\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u6578\u64da\u64cd\u4f5c\u80fd\u529b\uff0c\u7121\u8ad6\u662f\u5728\u67e5\u8a62\u3001\u66f4\u65b0\u9084\u662f\u805a\u5408\u64cd\u4f5c\u4e2d\uff0c\u8868\u9054\u5f0f\u90fd\u80fd\u9748\u6d3b\u61c9\u7528\u3002\u4e86\u89e3\u9019\u4e9b\u8868\u9054\u5f0f\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u5c07\u6709\u52a9\u65bc\u958b\u767c\u8005\u66f4\u9ad8\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\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\u66f4\u5feb\u7684\u6578\u64da\u8655\u7406\u901f\u5ea6\u548c\u66f4\u9ad8\u7684\u53ef\u7528\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MongoDB\u8853\u8a9e\u4e2d\u7684\u8868\u9054\u5f0f\uff0c\u638c\u63e1\u6578\u64da\u67e5\u8a62\u548c\u64cd\u4f5c\u7684\u95dc\u9375\u6982\u5ff5\uff0c\u63d0\u5347\u60a8\u7684\u6578\u64da\u5eab\u7ba1\u7406\u6280\u80fd\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-63694","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63694","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=63694"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63694\/revisions"}],"predecessor-version":[{"id":63695,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63694\/revisions\/63695"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=63694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=63694"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=63694"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}