There are two ways to delete a collection in MongoDB; After executing the drop command in the MongoDB database server, the output will be true or false. If the collection exists in the database and will be dele
If we want to remove all data from the collection 'userdetails' the following mongodb command can be used : >db.userdetails.remove({}) Remove a collection using drop() If we want to remove the entire 'userdetails' collection, including all of its documents the following mongodb command can...
Since MongoDB 5.0, thedropcommand and thedb.collection.drop()method will return an error if you attempt to drop a collection in the admin database or the config database from amongos. Connect to the config server instead and run the command to delete these collections. ...
Delete operations do not drop indexes, even if deleting all documents from a collection. Atomicity All write operations in MongoDB are atomic on the level of a single document. For more information on MongoDB and atomicity, seeAtomicity and Transactions. ...
Starting in MongoDB 4.0.2, dropping a collection deletes its associated zone/tag ranges. If you try to drop a collection in the admin database or the config database from amongossince MongoDB 5.0, the drop command and thedb.collection.drop()function will produce an error. Instead, connect...
delete: <collection>, deletes: [ { q : <query>, limit : <integer>, collation: <document>, hint: <document|string> }, ... ], comment: <any>, let: <document>, // Added in MongoDB 5.0 ordered: <boolean>, writeConcern: { <write concern> }, ...
MongoDB删除操作(Delete) 本文将介绍MongoDB删除操作(Delete),即 db.collection.deleteOne() 和 db.collection.deleteMany() 方法。 删除操作从集合中删除文档。MongoDB提供了以下删除集合文档的方法: db.collection.deleteOne()New in version 3.2 db.collection.deleteMany()New in version 3.2...
1、db.collection.deleteOne() 1.1 作用 从集合中删除单个文档 1. 1.2 语法: db.collection.deleteOne( <filter>, { writeConcern: <document>, collation: <document>, hint: <document|string> // Available starting in MongoDB 4.4 } ) 1.
MongoDB的 WiredTiger 存储引擎也有类似的行为。要回收磁盘空间,可以执行以下命令: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 use dbName// 在副本集 primary 上执行需要加 force 选项db.runCommand({compact:"collectionName",force:true}) 下面通过一个测试用例来实际演示这一过程。
1、db.collection.deleteOne() 1.1 作用 从集合中删除单个文档 1.2 语法: db.collection.deleteOne( <filter>, { writeConcern: <document>, collation: <document>, hint: <document|string> // Available starting in MongoDB 4.4 } ) 1.3 参数说明: 范围类型描述 filter document 使用查询运算符指定删除...