{"id":21581,"date":"2024-01-02T11:51:20","date_gmt":"2024-01-02T11:51:20","guid":{"rendered":"https:\/\/server.hk\/blog\/21581\/"},"modified":"2024-11-14T10:30:24","modified_gmt":"2024-11-14T02:30:24","slug":"mongodb-glossary-delete-operation","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21581\/","title":{"rendered":"MongoDB \u8a5e\u5f59\u8868 &#8211; \u522a\u9664\u64cd\u4f5c"},"content":{"rendered":"<h1 id=\"mongodb-glossary-delete-operation-yYuncZdYBo\">MongoDB \u8a5e\u5f59\u8868 &#8211; \u522a\u9664\u64cd\u4f5c<\/h1>\n<p>\u5728 MongoDB \u4e2d\uff0c\u522a\u9664\u64cd\u4f5c\u7528\u65bc\u5f9e\u96c6\u5408\u4e2d\u79fb\u9664\u6587\u4ef6\u3002\u5b83\u5141\u8a31\u4f60\u6839\u64da\u6307\u5b9a\u689d\u4ef6\u522a\u9664\u4e00\u500b\u6216\u591a\u500b\u6587\u4ef6\u3002\u7406\u89e3\u522a\u9664\u64cd\u4f5c\u7684\u5de5\u4f5c\u539f\u7406\u5c0d\u65bc\u6709\u6548\u7ba1\u7406\u4f60\u7684 MongoDB \u8cc7\u6599\u5eab\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2 id=\"delete-methods-yYuncZdYBo\">\u522a\u9664\u65b9\u6cd5<\/h2>\n<p>MongoDB \u63d0\u4f9b\u4e86\u5e7e\u7a2e\u57f7\u884c\u522a\u9664\u64cd\u4f5c\u7684\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><code>deleteOne()<\/code>\uff1a\u522a\u9664\u7b26\u5408\u6307\u5b9a\u689d\u4ef6\u7684\u4e00\u500b\u6587\u4ef6\u3002<\/li>\n<li><code>deleteMany()<\/code>\uff1a\u522a\u9664\u6240\u6709\u7b26\u5408\u6307\u5b9a\u689d\u4ef6\u7684\u6587\u4ef6\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u65b9\u6cd5\u5141\u8a31\u4f60\u6839\u64da\u5177\u9ad4\u689d\u4ef6\u522a\u9664\u6587\u4ef6\uff0c\u4f8b\u5982\u6b04\u4f4d\u503c\u6216\u689d\u4ef6\u7d44\u5408\u3002<\/p>\n<h2 id=\"delete-syntax-yYuncZdYBo\">\u522a\u9664\u8a9e\u6cd5<\/h2>\n<p>MongoDB \u4e2d\u522a\u9664\u64cd\u4f5c\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>db.collection.deleteOne(filter, options)\r\ndb.collection.deleteMany(filter, options)\r\n<\/code><\/pre>\n<p><code>filter<\/code> \u53c3\u6578\u6307\u5b9a\u6587\u4ef6\u5fc5\u9808\u7b26\u5408\u7684\u689d\u4ef6\uff0c\u8207 <code>find<\/code> \u64cd\u4f5c\u7684\u67e5\u8a62\u8a9e\u6cd5\u76f8\u540c\u3002<\/p>\n<p><code>options<\/code> \u53c3\u6578\u662f\u53ef\u9078\u7684\uff0c\u5141\u8a31\u4f60\u70ba\u522a\u9664\u64cd\u4f5c\u6307\u5b9a\u5176\u4ed6\u8a2d\u7f6e\uff0c\u4f8b\u5982\u522a\u9664\u6587\u4ef6\u7684\u6700\u5927\u6578\u91cf\u6216\u5beb\u5165\u95dc\u6ce8 (write concern)\u3002<\/p>\n<h2 id=\"delete-examples-yYuncZdYBo\">\u522a\u9664\u7bc4\u4f8b<\/h2>\n<p>\u8b93\u6211\u5011\u4f86\u770b\u4e00\u4e9b\u7bc4\u4f8b\uff0c\u8aaa\u660e\u522a\u9664\u64cd\u4f5c\u5982\u4f55\u5de5\u4f5c\uff1a<\/p>\n<p><strong>\u7bc4\u4f8b 1\uff1a<\/strong> \u522a\u9664\u55ae\u500b\u6587\u4ef6<\/p>\n<pre><code>db.users.deleteOne({ name: \"John\" })\r\n<\/code><\/pre>\n<p>\u6b64\u7bc4\u4f8b\u5f9e &#8220;users&#8221; \u96c6\u5408\u4e2d\u522a\u9664\u4e00\u500b\u540d\u5b57\u70ba &#8220;John&#8221; \u7684\u6587\u4ef6\u3002\u5982\u679c\u6709\u591a\u500b\u6587\u4ef6\u7b26\u5408\u689d\u4ef6\uff0c\u5247\u50c5\u522a\u9664\u7b2c\u4e00\u500b\u627e\u5230\u7684\u6587\u4ef6\u3002<\/p>\n<p><strong>\u7bc4\u4f8b 2\uff1a<\/strong> \u522a\u9664\u591a\u500b\u6587\u4ef6<\/p>\n<pre><code>db.products.deleteMany({ price: { $lt: 10 } })\r\n<\/code><\/pre>\n<p>\u6b64\u7bc4\u4f8b\u5f9e &#8220;products&#8221; \u96c6\u5408\u4e2d\u522a\u9664\u6240\u6709\u50f9\u683c\u5c0f\u65bc 10 \u7684\u6587\u4ef6\uff0c\u522a\u9664\u6240\u6709\u7b26\u5408\u689d\u4ef6\u7684\u591a\u500b\u6587\u4ef6\u3002<\/p>\n<h2 id=\"summary-yYuncZdYBo\">\u7e3d\u7d50<\/h2>\n<p>MongoDB \u4e2d\u7684\u522a\u9664\u64cd\u4f5c\u5141\u8a31\u4f60\u6839\u64da\u6307\u5b9a\u689d\u4ef6\u5f9e\u96c6\u5408\u4e2d\u79fb\u9664\u6587\u4ef6\u3002MongoDB \u63d0\u4f9b\u4e86 <code>deleteOne()<\/code> \u548c <code>deleteMany()<\/code> \u65b9\u6cd5\uff0c\u5206\u5225\u7528\u65bc\u522a\u9664\u55ae\u500b\u548c\u591a\u500b\u6587\u4ef6\u3002\u4e86\u89e3\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528\u9019\u4e9b\u65b9\u6cd5\uff0c\u5c0d\u65bc\u9ad8\u6548\u7ba1\u7406 MongoDB \u8cc7\u6599\u5eab\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u6b32\u4e86\u89e3\u66f4\u591a\u6709\u95dc VPS \u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\u7684\u8cc7\u8a0a\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-21581","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21581","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=21581"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21581\/revisions"}],"predecessor-version":[{"id":23865,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21581\/revisions\/23865"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}