MongoDB Community: The source-available, free-to-use, and self-managed version of MongoDB Syntax The command has the following syntax: db.runCommand( { dropDatabase:1, writeConcern: <document>, comment: <any> } ) Command Fields The command takes the following optional fields: ...
dropUser(username) db.repairDatabase() db.resetError() db.runCommand(cmdObj) run a database command. if cmdObj is a string, turns it into { cmdObj : 1 } db.serverStatus() db.setLogLevel(level,<component>) db.setProfilingLevel(level,<slowms>) 0=off 1=slow 2=all db.setWrite...
如果业务上能接受按日期等属性分库表,通过 drop 库表的方式能够最便捷的节省空间。 如果通过逻辑删除的方式,想要马上得到空间释放,可以进行 compact 操作,命令如下: 代码语言:txt AI代码解释 db.runCommand({compact: <collection name>}) 参考文档:https://www.mongodb.com/docs/v6.0/reference/command/compact/ ...
输入: use stu 输出: switched to db stu查看数据库show dbs 使用此命令查看刚刚创建的数据库是无法查看的,被插入数据后才可以看到输入:> show dbs 输出: admin 0.000GB local 0.000GB删除数据库db.dropDatabase() 删除当前所用的数据库输入: > db.dropDatabase() 输出: { "dropped" : "test", "ok" ...
db.dropDatabase() EOF 1. 2. 3. 结果输出如下: mongo localhost/db <<EOF db.dropDatabase() EOF MongoDB shell version: 2.2.2 connecting to: localhost/db { "dropped" : "db", "ok" : 1 } bye 1. 2. 3. 4. 5. 6. 7.
1.1基本操作db.addUser(username,password)//添加用户db.auth(usrename,password)//设置数据库连接验证db.cloneDataBase(fromhost)//从目标服务器克隆一个数据库db.commandHelp(name)//returns
needs to lock the data directory, so cannot be used if a mongod is currently accessing the same path --directoryperdb if dbpath specified, each db is in a separate directory --journal enable journaling -d [ --db ] arg database to use ...
不建议您直接通过dropDatabase命令删除拥有大量集合的库。 执行dropDatabase命令后,WT引擎会异步进行清理操作,逐个清理所有待删除表相关的元数据和物理文件。该操作可能会影响从节点的主从同步,导致复制延迟不断上涨;进而引起flowControl机制介入或者影响您所有{writeConcern:majority}的写入操作。
Database Operations¶ Authentication Commands¶ NameDescription logoutTerminates the current authenticated session. authenticateStarts an authenticated session using a username and password. copydbgetnonceThis is an internal command to generate a one-time password for use with thecopydbcommand. ...
Drop a database on the server with options for comments, sessions, type maps, and write concerns with the MongoDB PHP Library.