{"id":21516,"date":"2024-01-02T10:41:28","date_gmt":"2024-01-02T10:41:28","guid":{"rendered":"https:\/\/server.hk\/blog\/21516\/"},"modified":"2024-11-14T10:31:27","modified_gmt":"2024-11-14T02:31:27","slug":"mongodb-glossary-operator","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21516\/","title":{"rendered":"MongoDB \u8a5e\u5f59\u8868 &#8211; \u64cd\u4f5c\u7b26"},"content":{"rendered":"<h1 id=\"mongodb-glossary-operator-aRMHiKVBhh\">MongoDB \u8a5e\u5f59\u8868 &#8211; \u64cd\u4f5c\u7b26\uff08Operator\uff09<\/h1>\n<p>\u5728 MongoDB \u7684\u4e16\u754c\u4e2d\uff0c\u64cd\u4f5c\u7b26\u5728\u5c0d\u6578\u64da\u9032\u884c\u5404\u7a2e\u64cd\u4f5c\u6642\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002\u5b83\u5011\u662f\u5f37\u5927\u7684\u5de5\u5177\uff0c\u5141\u8a31\u7528\u6236\u4ee5\u9748\u6d3b\u548c\u9ad8\u6548\u7684\u65b9\u5f0f\u64cd\u4f5c\u548c\u67e5\u8a62\u6578\u64da\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e MongoDB \u4e2d\u64cd\u4f5c\u7b26\u7684\u6982\u5ff5\uff0c\u4e26\u7406\u89e3\u5b83\u5011\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"what-is-an-operator-in-mongodb-aRMHiKVBhh\">MongoDB \u4e2d\u7684\u64cd\u4f5c\u7b26\u662f\u4ec0\u9ebc\uff1f<\/h2>\n<p>\u5728 MongoDB \u4e2d\uff0c\u64cd\u4f5c\u7b26\u662f\u57f7\u884c\u7279\u5b9a\u6578\u64da\u64cd\u4f5c\u7684\u7b26\u865f\u6216\u95dc\u9375\u5b57\u3002\u9019\u4e9b\u64cd\u4f5c\u53ef\u4ee5\u5305\u62ec\u6bd4\u8f03\u3001\u908f\u8f2f\u3001\u7b97\u8853\u3001\u6578\u7d44\u53ca\u5176\u4ed6\u64cd\u4f5c\u3002\u64cd\u4f5c\u7b26\u7528\u65bc\u67e5\u8a62\u3001\u66f4\u65b0\u3001\u805a\u5408\u53ca\u5176\u4ed6 MongoDB \u64cd\u4f5c\uff0c\u4ee5\u904e\u6ffe\u3001\u8f49\u63db\u548c\u64cd\u4f5c\u6578\u64da\u3002<\/p>\n<h2 id=\"types-of-operators-in-mongodb-aRMHiKVBhh\">MongoDB \u4e2d\u7684\u64cd\u4f5c\u7b26\u985e\u578b<\/h2>\n<p>MongoDB \u63d0\u4f9b\u4e86\u5ee3\u6cdb\u7684\u64cd\u4f5c\u7b26\uff0c\u4ee5\u6eff\u8db3\u4e0d\u540c\u7684\u6578\u64da\u64cd\u4f5c\u9700\u6c42\u3002\u8b93\u6211\u5011\u63a2\u8a0e\u4e00\u4e9b\u5e38\u7528\u7684\u64cd\u4f5c\u7b26\u985e\u5225\uff1a<\/p>\n<h3 id=\"comparison-operators-aRMHiKVBhh\">\u6bd4\u8f03\u64cd\u4f5c\u7b26<\/h3>\n<p>\u6bd4\u8f03\u64cd\u4f5c\u7b26\u7528\u65bc\u6bd4\u8f03\u503c\u4e26\u8fd4\u56de\u5e03\u723e\u7d50\u679c\u3002\u5728 MongoDB \u4e2d\uff0c\u4e00\u4e9b\u5e38\u7528\u7684\u6bd4\u8f03\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<\/ul>\n<h3 id=\"logical-operators-aRMHiKVBhh\">\u908f\u8f2f\u64cd\u4f5c\u7b26<\/h3>\n<p>\u908f\u8f2f\u64cd\u4f5c\u7b26\u7528\u65bc\u5c0d\u8868\u9054\u5f0f\u57f7\u884c\u908f\u8f2f\u64cd\u4f5c\u4e26\u8fd4\u56de\u5e03\u723e\u7d50\u679c\u3002\u5728 MongoDB \u4e2d\uff0c\u4e00\u4e9b\u5e38\u7528\u7684\u908f\u8f2f\u64cd\u4f5c\u7b26\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>$and<\/code>: \u5c07\u67e5\u8a62\u5b50\u53e5\u7528\u908f\u8f2f AND \u9023\u63a5\uff0c\u8fd4\u56de\u7b26\u5408\u6240\u6709\u689d\u4ef6\u7684\u6587\u6a94\u3002<\/li>\n<li><code>$or<\/code>: \u5c07\u67e5\u8a62\u5b50\u53e5\u7528\u908f\u8f2f OR \u9023\u63a5\uff0c\u8fd4\u56de\u7b26\u5408\u81f3\u5c11\u4e00\u500b\u689d\u4ef6\u7684\u6587\u6a94\u3002<\/li>\n<li><code>$not<\/code>: \u53cd\u8f49\u67e5\u8a62\u8868\u9054\u5f0f\u7684\u6548\u679c\uff0c\u8fd4\u56de\u4e0d\u7b26\u5408\u689d\u4ef6\u7684\u6587\u6a94\u3002<\/li>\n<\/ul>\n<h3 id=\"array-operators-aRMHiKVBhh\">\u6578\u7d44\u64cd\u4f5c\u7b26<\/h3>\n<p>\u6578\u7d44\u64cd\u4f5c\u7b26\u7528\u65bc\u5c0d\u6587\u6a94\u4e2d\u7684\u6578\u7d44\u57f7\u884c\u64cd\u4f5c\u3002\u5728 MongoDB \u4e2d\uff0c\u4e00\u4e9b\u5e38\u7528\u7684\u6578\u7d44\u64cd\u4f5c\u7b26\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>$in<\/code>: \u5339\u914d\u6578\u7d44\u4e2d\u6307\u5b9a\u7684\u4efb\u610f\u503c\u3002<\/li>\n<li><code>$all<\/code>: \u5339\u914d\u5305\u542b\u6240\u6709\u6307\u5b9a\u5143\u7d20\u7684\u6578\u7d44\u3002<\/li>\n<li><code>$size<\/code>: \u5339\u914d\u5177\u6709\u7279\u5b9a\u6578\u91cf\u5143\u7d20\u7684\u6578\u7d44\u3002<\/li>\n<\/ul>\n<h3 id=\"element-operators-aRMHiKVBhh\">\u5143\u7d20\u64cd\u4f5c\u7b26<\/h3>\n<p>\u5143\u7d20\u64cd\u4f5c\u7b26\u7528\u65bc\u5c0d\u6587\u6a94\u4e2d\u7684\u5b57\u6bb5\u57f7\u884c\u64cd\u4f5c\u3002\u5728 MongoDB \u4e2d\uff0c\u4e00\u4e9b\u5e38\u7528\u7684\u5143\u7d20\u64cd\u4f5c\u7b26\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>$exists<\/code>: \u5339\u914d\u5305\u542b\u6307\u5b9a\u5b57\u6bb5\u7684\u6587\u6a94\u3002<\/li>\n<li><code>$type<\/code>: \u5339\u914d\u5177\u6709\u6307\u5b9a\u6578\u64da\u985e\u578b\u7684\u5b57\u6bb5\u7684\u6587\u6a94\u3002<\/li>\n<\/ul>\n<h2 id=\"examples-of-using-operators-in-mongodb-aRMHiKVBhh\">\u5728 MongoDB \u4e2d\u4f7f\u7528\u64cd\u4f5c\u7b26\u7684\u793a\u4f8b<\/h2>\n<p>\u8b93\u6211\u5011\u770b\u4e00\u4e9b\u793a\u4f8b\uff0c\u4ee5\u4e86\u89e3\u64cd\u4f5c\u7b26\u5728 MongoDB \u4e2d\u662f\u5982\u4f55\u4f7f\u7528\u7684\uff1a<\/p>\n<pre><code>db.users.find({ age: { $gt: 25 } })\r\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u67e5\u8a62\u5c07\u67e5\u627e\u6240\u6709\u5e74\u9f61\u5927\u65bc 25 \u6b72\u7684\u7528\u6236\u3002<\/p>\n<pre><code>db.products.update({ category: \"Electronics\" }, { $set: { price: 100 } })\r\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u66f4\u65b0\u64cd\u4f5c\u5c07\u628a\u6240\u6709\u300c\u96fb\u5b50\u7522\u54c1\u300d\u985e\u5225\u7684\u7522\u54c1\u50f9\u683c\u8a2d\u7f6e\u70ba 100\u3002<\/p>\n<h2 id=\"conclusion-aRMHiKVBhh\">\u7d50\u8ad6<\/h2>\n<p>\u64cd\u4f5c\u7b26\u662f MongoDB \u7684\u4e00\u500b\u7d44\u6210\u90e8\u5206\uff0c\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u5c0d\u6578\u64da\u57f7\u884c\u5404\u7a2e\u64cd\u4f5c\u3002\u7121\u8ad6\u662f\u67e5\u8a62\u3001\u66f4\u65b0\u9084\u662f\u805a\u5408\u6578\u64da\uff0c\u64cd\u4f5c\u7b26\u90fd\u63d0\u4f9b\u4e86\u5fc5\u8981\u7684\u9748\u6d3b\u6027\u548c\u80fd\u529b\uff0c\u4ee5\u9ad8\u6548\u5730\u64cd\u4f5c\u6578\u64da\u3002\u901a\u904e\u4e86\u89e3 MongoDB \u4e2d\u53ef\u7528\u7684\u4e0d\u540c\u985e\u578b\u7684\u64cd\u4f5c\u7b26\uff0c\u7528\u6236\u53ef\u4ee5\u5229\u7528\u5b83\u5011\u7684\u80fd\u529b\u4f86\u69cb\u5efa\u7a69\u5065\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"summary-aRMHiKVBhh\">\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u4e4b\uff0cMongoDB \u4e2d\u7684\u64cd\u4f5c\u7b26\u662f\u7528\u65bc\u5c0d\u6578\u64da\u57f7\u884c\u7279\u5b9a\u64cd\u4f5c\u7684\u7b26\u865f\u6216\u95dc\u9375\u5b57\u3002\u5b83\u5011\u5c0d\u65bc\u5728\u67e5\u8a62\u3001\u66f4\u65b0\u548c\u805a\u5408\u4e2d\u904e\u6ffe\u3001\u8f49\u63db\u548c\u64cd\u4f5c\u6578\u64da\u81f3\u95dc\u91cd\u8981\u3002MongoDB \u63d0\u4f9b\u4e86\u5404\u7a2e\u985e\u578b\u7684\u64cd\u4f5c\u7b26\uff0c\u5305\u62ec\u6bd4\u8f03\u3001\u908f\u8f2f\u3001\u6578\u7d44\u548c\u5143\u7d20\u64cd\u4f5c\u7b26\u3002\u901a\u904e\u6709\u6548\u5229\u7528\u9019\u4e9b\u64cd\u4f5c\u7b26\uff0c\u7528\u6236\u53ef\u4ee5\u5145\u5206\u767c\u63ee MongoDB \u5728\u6578\u64da\u7ba1\u7406\u9700\u6c42\u4e2d\u7684\u6f5b\u529b\u3002<\/p>\n<p>\u6b32\u4e86\u89e3\u6709\u95dc VPS \u8a17\u7ba1\u670d\u52d9\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB \u8a5e\u5f59\u8868 &#038;#82&#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-21516","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21516","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=21516"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21516\/revisions"}],"predecessor-version":[{"id":23946,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21516\/revisions\/23946"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}