{"id":5373,"date":"2024-11-14T11:47:18","date_gmt":"2024-11-14T03:47:18","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5373\/"},"modified":"2024-11-14T11:47:18","modified_gmt":"2024-11-14T03:47:18","slug":"mongodb%e6%80%8e%e4%b9%88%e5%88%a0%e9%99%a4%e6%96%87%e6%a1%a3","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5373\/","title":{"rendered":"mongodb\u600e\u4e48\u5220\u9664\u6587\u6863"},"content":{"rendered":"<blockquote><p>\n  mongodb \u63d0\u4f9b\u4e86\u591a\u79cd\u6587\u6863\u5220\u9664\u65b9\u6cd5\uff1a\u5220\u9664\u5355\u4e2a\u6587\u6863\uff1a\u4f7f\u7528 deleteone() \u65b9\u6cd5\uff0c\u6307\u5b9a\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\u3002\u5220\u9664\u591a\u4e2a\u6587\u6863\uff1a\u4f7f\u7528 deletemany() \u65b9\u6cd5\uff0c\u6307\u5b9a\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\u3002\u5220\u9664\u6574\u4e2a\u96c6\u5408\uff1a\u4f7f\u7528 drop() \u65b9\u6cd5\u3002\u4f7f\u7528\u7d22\u5f15\u5220\u9664\u6587\u6863\uff1a\u4f7f\u7528 findoneanddelete() \u65b9\u6cd5\uff0c\u6307\u5b9a\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\u5e76\u8fd4\u56de\u5df2\u5220\u9664\u6587\u6863\u3002\u5220\u9664\u5d4c\u5165\u5f0f\u6587\u6863\uff1a\u4f7f\u7528 $unset \u66f4\u65b0\u64cd\u4f5c\u7b26\uff0c\u5c06\u5d4c\u5165\u5f0f\u6587\u6863\u5b57\u6bb5\u8bbe\u7f6e\u4e3a null\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202405\/28\/2024052802361890389.jpg\" class=\"aligncenter\" title=\"mongodb\u600e\u4e48\u5220\u9664\u6587\u6863\u63d2\u56fe\" alt=\"mongodb\u600e\u4e48\u5220\u9664\u6587\u6863\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 MongoDB \u5220\u9664\u6587\u6863<\/strong><\/p>\n<p>MongoDB \u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u5220\u9664\u96c6\u5408\u4e2d\u7684\u6587\u6863\u3002<\/p>\n<p><strong>\u5220\u9664\u5355\u4e2a\u6587\u6863<\/strong><\/p>\n<p>\u8981\u5220\u9664\u5355\u4e2a\u6587\u6863\uff0c\u53ef\u4ee5\u4f7f\u7528 deleteOne() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\uff0c\u6307\u5b9a\u8981\u5220\u9664\u7684\u6587\u6863\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>db.collection.deleteOne({ _id: ObjectId(\"5f21489c0cf8d519bcb89573\") });<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u5220\u9664\u591a\u4e2a\u6587\u6863<\/strong><\/p>\n<p>\u8981\u5220\u9664\u591a\u4e2a\u6587\u6863\uff0c\u53ef\u4ee5\u4f7f\u7528 deleteMany() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u4e5f\u63a5\u53d7\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\uff0c\u6307\u5b9a\u8981\u5220\u9664\u7684\u6587\u6863\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>db.collection.deleteMany({ age: { $gt: 30 } });<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u5220\u9664\u6574\u4e2a\u96c6\u5408<\/strong><\/p>\n<p>\u8981\u5220\u9664\u6574\u4e2a\u96c6\u5408\u53ca\u5176\u6240\u6709\u6587\u6863\uff0c\u53ef\u4ee5\u4f7f\u7528 drop() \u65b9\u6cd5\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>db.collection.drop();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528\u7d22\u5f15\u5220\u9664\u6587\u6863<\/strong><\/p>\n<p>\u5982\u679c\u5728\u5b57\u6bb5\u4e0a\u521b\u5efa\u4e86\u7d22\u5f15\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528 findOneAndDelete() \u65b9\u6cd5\u5feb\u901f\u5220\u9664\u6587\u6863\u3002\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\uff0c\u6307\u5b9a\u8981\u5220\u9664\u7684\u6587\u6863\uff0c\u5e76\u8fd4\u56de\u5df2\u5220\u9664\u7684\u6587\u6863\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>db.collection.findOneAndDelete({ name: \"John\" });<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u5220\u9664\u5d4c\u5165\u5f0f\u6587\u6863<\/strong><\/p>\n<p>\u8981\u5220\u9664\u5d4c\u5165\u5f0f\u6587\u6863\uff0c\u53ef\u4ee5\u4f7f\u7528 unset \u66f4\u65b0\u64cd\u4f5c\u7b26\u3002\u8be5\u64cd\u4f5c\u7b26\u5c06\u5d4c\u5165\u5f0f\u6587\u6863\u7684\u5b57\u6bb5\u8bbe\u7f6e\u4e3a null\uff0c\u4ece\u800c\u6709\u6548\u5730\u5220\u9664\u8be5\u6587\u6863\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>db.collection.updateOne(\n  { _id: ObjectId(\"5f21489c0cf8d519bcb89573\") },\n  { $unset: { \"address.city\": 1 } }\n);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u5220\u9664\u6587\u6863\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>mongodb \u63d0\u4f9b\u4e86\u591a\u79cd\u6587\u6863\u5220\u9664\u65b9\u6cd5\uff1a\u5220\u9664\u5355\u4e2a\u6587\u6863\uff1a\u4f7f\u7528 deleteone() \u65b9\u6cd5\uff0c\u6307\u5b9a\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\u3002\u5220\u9664\u591a\u4e2a\u6587\u6863\uff1a\u4f7f\u7528 deletemany() \u65b9\u6cd5\uff0c\u6307\u5b9a\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\u3002\u5220\u9664\u6574\u4e2a\u96c6\u5408\uff1a\u4f7f\u7528 drop() \u65b9\u6cd5\u3002\u4f7f\u7528\u7d22\u5f15\u5220\u9664\u6587\u6863\uff1a\u4f7f\u7528 findoneanddelete() \u65b9\u6cd5\uff0c\u6307\u5b9a\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\u5e76\u8fd4\u56de\u5df2\u5220\u9664\u6587\u6863\u3002\u5220\u9664\u5d4c\u5165\u5f0f\u6587\u6863\uff1a\u4f7f\u7528 $unset \u66f4\u65b0\u64cd\u4f5c\u7b26\uff0c\u5c06\u5d4c\u5165\u5f0f\u6587\u6863\u5b57\u6bb5\u8bbe\u7f6e\u4e3a null\u3002 \u5982\u4f55\u4f7f\u7528 MongoDB \u5220\u9664\u6587\u6863 MongoDB \u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u5220\u9664\u96c6\u5408\u4e2d\u7684\u6587\u6863\u3002 \u5220\u9664\u5355\u4e2a\u6587\u6863 \u8981\u5220\u9664\u5355\u4e2a\u6587\u6863\uff0c\u53ef\u4ee5\u4f7f\u7528 deleteOne() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\uff0c\u6307\u5b9a\u8981\u5220\u9664\u7684\u6587\u6863\u3002\u4f8b\u5982\uff1a db.collection.deleteOne({ _id: ObjectId(&#8220;5f21489c0cf8d519bcb89573&#8221;) }); \u767b\u5f55\u540e\u590d\u5236 \u5220\u9664\u591a\u4e2a\u6587\u6863 \u8981\u5220\u9664\u591a\u4e2a\u6587\u6863\uff0c\u53ef\u4ee5\u4f7f\u7528 deleteMany() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u4e5f\u63a5\u53d7\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\uff0c\u6307\u5b9a\u8981\u5220\u9664\u7684\u6587\u6863\u3002\u4f8b\u5982\uff1a db.collection.deleteMany({ age: { $gt: 30 } }); \u767b\u5f55\u540e\u590d\u5236 \u5220\u9664\u6574\u4e2a\u96c6\u5408 \u8981\u5220\u9664\u6574\u4e2a\u96c6\u5408\u53ca\u5176\u6240\u6709\u6587\u6863\uff0c\u53ef\u4ee5\u4f7f\u7528 drop() \u65b9\u6cd5\u3002\u4f8b\u5982\uff1a db.collection.drop(); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528\u7d22\u5f15\u5220\u9664\u6587\u6863 \u5982\u679c\u5728\u5b57\u6bb5\u4e0a\u521b\u5efa\u4e86\u7d22\u5f15\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528 findOneAndDelete() \u65b9\u6cd5\u5feb\u901f\u5220\u9664\u6587\u6863\u3002\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u67e5\u8be2\u5bf9\u8c61\uff0c\u6307\u5b9a\u8981\u5220\u9664\u7684\u6587\u6863\uff0c\u5e76\u8fd4\u56de\u5df2\u5220\u9664\u7684\u6587\u6863\u3002\u4f8b\u5982\uff1a db.collection.findOneAndDelete({ name: &#8220;John&#8221; }); \u767b\u5f55\u540e\u590d\u5236 \u5220\u9664\u5d4c\u5165\u5f0f\u6587\u6863 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5373","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5373","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5373"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5373\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5373"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5373"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5373"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}