{"id":63704,"date":"2024-10-14T01:46:22","date_gmt":"2024-10-13T17:46:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/63704\/"},"modified":"2024-10-14T01:46:22","modified_gmt":"2024-10-13T17:46:22","slug":"mongodb%e8%a1%93%e8%aa%9e-%e8%ae%80%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/63704\/","title":{"rendered":"MongoDB\u8853\u8a9e &#8211; \u8b80\u64cd\u4f5c"},"content":{"rendered":"<h1 id=\"mongodb%e8%a1%93%e8%aa%9e-%e8%ae%80%e6%93%8d%e4%bd%9c-ClsZVHjeVh\">MongoDB\u8853\u8a9e &#8211; \u8b80\u64cd\u4f5c<\/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\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMongoDB\u4e2d\u7684\u8b80\u64cd\u4f5c\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u6709\u6548\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u3002<\/p>\n<h2 id=\"mongodb%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-ClsZVHjeVh\">MongoDB\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>MongoDB\u662f\u4e00\u7a2e\u6587\u6a94\u5c0e\u5411\u7684\u6578\u64da\u5eab\uff0c\u4f7f\u7528BSON\uff08\u985e\u4f3cJSON\u7684\u4e8c\u9032\u5236\u683c\u5f0f\uff09\u4f86\u5b58\u5132\u6578\u64da\u3002\u9019\u7a2e\u7d50\u69cb\u4f7f\u5f97MongoDB\u80fd\u5920\u9748\u6d3b\u5730\u8655\u7406\u5404\u7a2e\u6578\u64da\u985e\u578b\uff0c\u4e26\u4e14\u652f\u6301\u8907\u96dc\u7684\u67e5\u8a62\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e8%ae%80%e6%93%8d%e4%bd%9c%e7%9a%84%e5%9f%ba%e6%9c%ac%e9%a1%9e%e5%9e%8b-ClsZVHjeVh\">\u8b80\u64cd\u4f5c\u7684\u57fa\u672c\u985e\u578b<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c\u8b80\u64cd\u4f5c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u5e7e\u7a2e\uff1a<\/p>\n<ul>\n<li><strong>find()<\/strong>\uff1a\u7528\u65bc\u67e5\u8a62\u96c6\u5408\u4e2d\u7684\u6587\u6a94\u3002<\/li>\n<li><strong>findOne()<\/strong>\uff1a\u7528\u65bc\u67e5\u8a62\u96c6\u5408\u4e2d\u7684\u55ae\u500b\u6587\u6a94\u3002<\/li>\n<li><strong>aggregate()<\/strong>\uff1a\u7528\u65bc\u57f7\u884c\u805a\u5408\u64cd\u4f5c\uff0c\u80fd\u5920\u9032\u884c\u66f4\u8907\u96dc\u7684\u6578\u64da\u8655\u7406\u3002<\/li>\n<\/ul>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8find%e9%80%b2%e8%a1%8c%e6%9f%a5%e8%a9%a2-ClsZVHjeVh\">1. \u4f7f\u7528find()\u9032\u884c\u67e5\u8a62<\/h3>\n<p>find()\u65b9\u6cd5\u662fMongoDB\u4e2d\u6700\u5e38\u7528\u7684\u67e5\u8a62\u65b9\u6cd5\u3002\u5b83\u53ef\u4ee5\u63a5\u53d7\u67e5\u8a62\u689d\u4ef6\u548c\u9078\u64c7\u5b57\u6bb5\u7684\u53c3\u6578\uff0c\u4e26\u8fd4\u56de\u7b26\u5408\u689d\u4ef6\u7684\u6240\u6709\u6587\u6a94\u3002<\/p>\n<pre><code>\ndb.collection.find({ \"age\": { \"$gt\": 25 } }, { \"name\": 1, \"age\": 1 });\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u78bc\u5c07\u67e5\u8a62\u6240\u6709\u5e74\u9f61\u5927\u65bc25\u7684\u6587\u6a94\uff0c\u4e26\u50c5\u8fd4\u56de\u59d3\u540d\u548c\u5e74\u9f61\u5b57\u6bb5\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8findone%e6%9f%a5%e8%a9%a2%e5%96%ae%e5%80%8b%e6%96%87%e6%aa%94-ClsZVHjeVh\">2. \u4f7f\u7528findOne()\u67e5\u8a62\u55ae\u500b\u6587\u6a94<\/h3>\n<p>\u7576\u53ea\u9700\u8981\u67e5\u8a62\u4e00\u500b\u6587\u6a94\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528findOne()\u65b9\u6cd5\u3002\u9019\u500b\u65b9\u6cd5\u6703\u8fd4\u56de\u7b26\u5408\u689d\u4ef6\u7684\u7b2c\u4e00\u500b\u6587\u6a94\u3002<\/p>\n<pre><code>\ndb.collection.findOne({ \"name\": \"Alice\" });\n<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u67e5\u8a62\u540d\u70baAlice\u7684\u6587\u6a94\uff0c\u4e26\u8fd4\u56de\u8a72\u6587\u6a94\u7684\u6240\u6709\u5b57\u6bb5\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8aggregate%e9%80%b2%e8%a1%8c%e8%81%9a%e5%90%88%e6%9f%a5%e8%a9%a2-ClsZVHjeVh\">3. \u4f7f\u7528aggregate()\u9032\u884c\u805a\u5408\u67e5\u8a62<\/h3>\n<p>aggregate()\u65b9\u6cd5\u5141\u8a31\u7528\u6236\u57f7\u884c\u66f4\u8907\u96dc\u7684\u67e5\u8a62\uff0c\u5305\u62ec\u5206\u7d44\u3001\u6392\u5e8f\u548c\u8a08\u7b97\u7b49\u64cd\u4f5c\u3002\u9019\u5c0d\u65bc\u9700\u8981\u9032\u884c\u6578\u64da\u5206\u6790\u7684\u60c5\u6cc1\u7279\u5225\u6709\u7528\u3002<\/p>\n<pre><code>\ndb.collection.aggregate([\n    { \"$match\": { \"status\": \"A\" } },\n    { \"$group\": { \"_id\": \"$cust_id\", \"total\": { \"$sum\": \"$amount\" } } }\n]);\n<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u67e5\u8a62\u6240\u6709\u72c0\u614b\u70ba&#8221;A&#8221;\u7684\u6587\u6a94\uff0c\u4e26\u6839\u64da\u5ba2\u6236ID\u9032\u884c\u5206\u7d44\uff0c\u8a08\u7b97\u6bcf\u500b\u5ba2\u6236\u7684\u7e3d\u91d1\u984d\u3002<\/p>\n<h2 id=\"%e8%ae%80%e6%93%8d%e4%bd%9c%e7%9a%84%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-ClsZVHjeVh\">\u8b80\u64cd\u4f5c\u7684\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u5728\u9032\u884c\u8b80\u64cd\u4f5c\u6642\uff0c\u6027\u80fd\u662f\u975e\u5e38\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u63d0\u9ad8\u8b80\u64cd\u4f5c\u6027\u80fd\u7684\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u7d22\u5f15<\/strong>\uff1a\u70ba\u67e5\u8a62\u5b57\u6bb5\u5275\u5efa\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<li><strong>\u9650\u5236\u8fd4\u56de\u5b57\u6bb5<\/strong>\uff1a\u53ea\u8fd4\u56de\u5fc5\u8981\u7684\u5b57\u6bb5\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u91cf\u3002<\/li>\n<li><strong>\u4f7f\u7528\u805a\u5408\u7ba1\u9053<\/strong>\uff1a\u5728\u9700\u8981\u9032\u884c\u591a\u6b65\u67e5\u8a62\u6642\uff0c\u4f7f\u7528\u805a\u5408\u7ba1\u9053\u53ef\u4ee5\u63d0\u9ad8\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-ClsZVHjeVh\">\u7d50\u8ad6<\/h2>\n<p>MongoDB\u7684\u8b80\u64cd\u4f5c\u63d0\u4f9b\u4e86\u9748\u6d3b\u4e14\u5f37\u5927\u7684\u6578\u64da\u6aa2\u7d22\u80fd\u529b\u3002\u901a\u904e\u7406\u89e3\u548c\u904b\u7528\u5404\u7a2e\u67e5\u8a62\u65b9\u6cd5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u7372\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u57fa\u672c\u7684find()\u65b9\u6cd5\uff0c\u9084\u662f\u9032\u884c\u8907\u96dc\u7684\u805a\u5408\u67e5\u8a62\uff0c\u638c\u63e1\u9019\u4e9b\u8853\u8a9e\u548c\u6280\u8853\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u3001<code>\u670d\u52a1\u5668<\/code>\u3001<code>\u4e91\u670d\u52a1\u5668<\/code>\u7b49\u76f8\u95dc\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MongoDB\u4e2d\u7684\u8b80\u64cd\u4f5c\u8853\u8a9e\uff0c\u638c\u63e1\u6578\u64da\u67e5\u8a62\u3001\u7d22\u5f15\u4f7f\u7528\u53ca\u6027\u80fd\u512a\u5316\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6548\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-63704","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63704","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=63704"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63704\/revisions"}],"predecessor-version":[{"id":63705,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63704\/revisions\/63705"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=63704"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=63704"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=63704"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}