{"id":21511,"date":"2024-01-02T10:36:23","date_gmt":"2024-01-02T10:36:23","guid":{"rendered":"https:\/\/server.hk\/blog\/21511\/"},"modified":"2024-11-14T10:31:33","modified_gmt":"2024-11-14T02:31:33","slug":"mongodb-glossary-query","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21511\/","title":{"rendered":"MongoDB\u8a5e\u5f59\u8868 &#8211; \u904e\u6ffe\u5668"},"content":{"rendered":"<h1 id=\"mongodb-glossary-filter-bNBcbHKrkz\">MongoDB\u8a5e\u5f59\u8868 &#8211; \u904e\u6ffe\u5668<\/h1>\n<p>\u5728MongoDB\u4e2d\uff0c\u904e\u6ffe\u5668\u662f\u7528\u4f86\u6aa2\u7d22\u96c6\u5408\u4e2d\u7279\u5b9a\u6587\u6a94\u7684\u67e5\u8a62\u689d\u4ef6\u3002\u5b83\u4f7f\u60a8\u80fd\u5920\u7e2e\u5c0f\u641c\u7d22\u7bc4\u570d\uff0c\u53ea\u6aa2\u7d22\u7b26\u5408\u7279\u5b9a\u6a19\u6e96\u7684\u6587\u6a94\u3002\u904e\u6ffe\u5668\u662fMongoDB\u9748\u6d3b\u800c\u5f37\u5927\u7684\u67e5\u8a62\u80fd\u529b\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002<\/p>\n<h2 id=\"understanding-filters-in-mongodb-bNBcbHKrkz\">\u7406\u89e3MongoDB\u4e2d\u7684\u904e\u6ffe\u5668<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c\u904e\u6ffe\u5668\u8207find()\u65b9\u6cd5\u4e00\u8d77\u4f7f\u7528\uff0c\u4ee5\u6307\u5b9a\u6587\u6a94\u5fc5\u9808\u6eff\u8db3\u7684\u689d\u4ef6\uff0c\u624d\u80fd\u5305\u542b\u5728\u7d50\u679c\u96c6\u4e2d\u3002find()\u65b9\u6cd5\u5c07\u904e\u6ffe\u5668\u4f5c\u70ba\u5176\u53c3\u6578\uff0c\u4e26\u8fd4\u56de\u6307\u5411\u5339\u914d\u6587\u6a94\u7684\u6e38\u6a19\u3002<\/p>\n<p>MongoDB\u4e2d\u7684\u904e\u6ffe\u5668\u4f7f\u7528\u985e\u4f3cJSON\u7684\u8a9e\u6cd5\u8868\u793a\uff0c\u7a31\u70baMongoDB\u67e5\u8a62\u8a9e\u8a00\uff08MQL\uff09\u3002MQL\u63d0\u4f9b\u4e86\u4e00\u5957\u8c50\u5bcc\u7684\u64cd\u4f5c\u7b26\u548c\u8868\u9054\u5f0f\uff0c\u4ee5\u69cb\u5efa\u8907\u96dc\u7684\u904e\u6ffe\u5668\u3002<\/p>\n<h3 id=\"filter-operators-bNBcbHKrkz\">\u904e\u6ffe\u5668\u64cd\u4f5c\u7b26<\/h3>\n<p>MongoDB\u63d0\u4f9b\u4e86\u591a\u7a2e\u904e\u6ffe\u5668\u64cd\u4f5c\u7b26\u4f86\u57f7\u884c\u6bd4\u8f03\u3001\u908f\u8f2f\u904b\u7b97\u548c\u5143\u7d20\u5339\u914d\u3002\u4e00\u4e9b\u5e38\u7528\u7684\u904e\u6ffe\u5668\u64cd\u4f5c\u7b26\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>$eq<\/code>: \u5339\u914d\u7b49\u65bc\u6307\u5b9a\u503c\u7684\u503c\u3002<\/li>\n<li><code>$ne<\/code>: \u5339\u914d\u4e0d\u7b49\u65bc\u6307\u5b9a\u503c\u7684\u503c\u3002<\/li>\n<li><code>$gt<\/code>: \u5339\u914d\u5927\u65bc\u6307\u5b9a\u503c\u7684\u503c\u3002<\/li>\n<li><code>$lt<\/code>: \u5339\u914d\u5c0f\u65bc\u6307\u5b9a\u503c\u7684\u503c\u3002<\/li>\n<li><code>$gte<\/code>: \u5339\u914d\u5927\u65bc\u6216\u7b49\u65bc\u6307\u5b9a\u503c\u7684\u503c\u3002<\/li>\n<li><code>$lte<\/code>: \u5339\u914d\u5c0f\u65bc\u6216\u7b49\u65bc\u6307\u5b9a\u503c\u7684\u503c\u3002<\/li>\n<li><code>$in<\/code>: \u5339\u914d\u6578\u7d44\u4e2d\u6307\u5b9a\u7684\u4efb\u4f55\u503c\u3002<\/li>\n<li><code>$nin<\/code>: \u5339\u914d\u6578\u7d44\u4e2d\u4e0d\u542b\u7684\u4efb\u4f55\u503c\u3002<\/li>\n<li><code>$and<\/code>: \u7528\u908f\u8f2fAND\u9023\u63a5\u591a\u500b\u904e\u6ffe\u689d\u4ef6\u3002<\/li>\n<li><code>$or<\/code>: \u7528\u908f\u8f2fOR\u9023\u63a5\u591a\u500b\u904e\u6ffe\u689d\u4ef6\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u64cd\u4f5c\u7b26\u53ef\u4ee5\u7d50\u5408\u548c\u5d4c\u5957\uff0c\u4ee5\u5275\u5efa\u7b26\u5408\u7279\u5b9a\u9700\u6c42\u7684\u8907\u96dc\u904e\u6ffe\u5668\u3002<\/p>\n<h3 id=\"filter-examples-bNBcbHKrkz\">\u904e\u6ffe\u5668\u793a\u4f8b<\/h3>\n<p>\u8b93\u6211\u5011\u8003\u616e\u4e00\u500b\u4ee3\u8868\u66f8\u7c4d\u7684\u6587\u6a94\u96c6\u5408\uff1a<\/p>\n<pre><code>{\r\n  \"_id\": 1,\r\n  \"title\": \"MongoDB in Action\",\r\n  \"author\": \"Kyle Banker\",\r\n  \"price\": 39.99,\r\n  \"category\": \"Database\"\r\n},\r\n{\r\n  \"_id\": 2,\r\n  \"title\": \"Clean Code\",\r\n  \"author\": \"Robert C. Martin\",\r\n  \"price\": 49.99,\r\n  \"category\": \"Software Development\"\r\n},\r\n{\r\n  \"_id\": 3,\r\n  \"title\": \"The Pragmatic Programmer\",\r\n  \"author\": \"Andrew Hunt, David Thomas\",\r\n  \"price\": 29.99,\r\n  \"category\": \"Software Development\"\r\n}<\/code><\/pre>\n<p>\u8981\u67e5\u627e\u50f9\u683c\u4f4e\u65bc$40\u7684\u66f8\u7c4d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u904e\u6ffe\u5668\uff1a<\/p>\n<pre><code>{ \"price\": { \"$lt\": 40 } }<\/code><\/pre>\n<p>\u6b64\u904e\u6ffe\u5668\u5c07\u5339\u914d\u96c6\u5408\u4e2d\u7684\u7b2c\u4e00\u548c\u7b2c\u4e09\u500b\u6587\u6a94\u3002<\/p>\n<p>\u60a8\u4e5f\u53ef\u4ee5\u4f7f\u7528\u908f\u8f2f\u64cd\u4f5c\u7b26\u7d50\u5408\u591a\u500b\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u8981\u67e5\u627e\u300c\u8edf\u4ef6\u958b\u767c\u300d\u985e\u5225\u4e2d\u50f9\u683c\u4f4e\u65bc$50\u7684\u66f8\u7c4d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u904e\u6ffe\u5668\uff1a<\/p>\n<pre><code>{ \"category\": \"Software Development\", \"price\": { \"$lt\": 50 } }<\/code><\/pre>\n<p>\u6b64\u904e\u6ffe\u5668\u5c07\u5339\u914d\u96c6\u5408\u4e2d\u7684\u7b2c\u4e8c\u548c\u7b2c\u4e09\u500b\u6587\u6a94\u3002<\/p>\n<h2 id=\"conclusion-bNBcbHKrkz\">\u7d50\u8ad6<\/h2>\n<p>\u904e\u6ffe\u5668\u662fMongoDB\u4e2d\u7684\u4e00\u500b\u57fa\u672c\u6982\u5ff5\uff0c\u4f7f\u60a8\u53ef\u4ee5\u6839\u64da\u67d0\u4e9b\u6a19\u6e96\u5f9e\u96c6\u5408\u4e2d\u6aa2\u7d22\u7279\u5b9a\u6587\u6a94\u3002\u901a\u904e\u4f7f\u7528\u904e\u6ffe\u5668\u64cd\u4f5c\u7b26\u548c\u8868\u9054\u5f0f\uff0c\u60a8\u53ef\u4ee5\u69cb\u5efa\u5f37\u5927\u800c\u9748\u6d3b\u7684\u67e5\u8a62\uff0c\u4ee5\u6eff\u8db3\u60a8\u7684\u6578\u64da\u6aa2\u7d22\u9700\u6c42\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u6709\u95dcMongoDB\u53ca\u5176\u67e5\u8a62\u529f\u80fd\u7684\u66f4\u591a\u8cc7\u8a0a\uff0c\u5efa\u8b70\u63a2\u7d22 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u9019\u662f\u4e00\u5bb6\u9818\u5148\u7684VPS\u4e3b\u6a5f\u516c\u53f8\uff0c\u63d0\u4f9b\u53ef\u9760\u4e14\u9ad8\u6027\u80fd\u7684\u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB\u8a5e\u5f59\u8868 &#038;#821&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-21511","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21511","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=21511"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21511\/revisions"}],"predecessor-version":[{"id":23952,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21511\/revisions\/23952"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21511"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21511"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21511"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}