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调用命令db.copyDatabase(\’crm\’, \’crm_copy\’, \’localhost\’, \’admin\’, \’123456\’)

提示我WARNING: db.copyDatabase will only function with MongoDB 4.0 and below. See http://dochub.mongodb.org/core/4.2-copydb-clone

只能是4.0 版本一下能用,那以上版本如何复制数据库

查看帮助也没有其他方法,MongoDB刚入坑,求解救

DB methods:
db.adminCommand(nameOrDocument) – switches to \’admin\’ db, and runs command [just calls db.runCommand(…)]
db.aggregate([pipeline], {options}) – performs a collectionless aggregation on this database; returns a cursor
db.auth(username, password)
db.cloneDatabase(fromhost) – will only function with MongoDB 4.0 and below
db.commandHelp(name) returns the help for the command
db.copyDatabase(fromdb, todb, fromhost) – will only function with MongoDB 4.0 and below
db.createCollection(name, {size: …, capped: …, max: …})
db.createUser(userDocument)
db.createView(name, viewOn, [{$operator: {…}}, …], {viewOptions})
db.currentOp() displays currently executing operations in the db
db.dropDatabase(writeConcern)
db.dropUser(username)
db.eval() – deprecated
db.fsyncLock() flush data to disk and lock server for backups
db.fsyncUnlock() unlocks server following a db.fsyncLock()
db.getCollection(cname) same as db[\’cname\’] or db.cname
db.getCollectionInfos([filter]) – returns a list that contains the names and options of the db\’s collections
db.getCollectionNames()
db.getLastError() – just returns the err msg string
db.getLastErrorObj() – return full status object
db.getLogComponents()
db.getMongo() get the server connection object
db.getMongo().setSlaveOk() allow queries on a replication slave server
db.getName()
db.getProfilingLevel() – deprecated
db.getProfilingStatus() – returns if profiling is on and slow threshold
db.getReplicationInfo()
db.getSiblingDB(name) get the db at the same server as this one
db.getWriteConcern() – returns the write concern used for any operations on this db, inherited from server object if set
db.hostInfo() get details about the server\’s host
db.isMaster() check replica primary status
db.killOp(opid) kills the current operation in the db
db.listCommands() lists all the db commands
db.loadServerScripts() loads all the scripts in db.system.js
db.logout()
db.printCollectionStats()
db.printReplicationInfo()
db.printShardingStatus()
db.printSlaveReplicationInfo()
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.setVerboseShell(flag) display extra information in shell output
db.setWriteConcern(<write concern doc>) – sets the write concern for writes to the db
db.shutdownServer()
db.stats()
db.unsetWriteConcern(<write concern doc>) – unsets the write concern for writes to the db
db.version() current version of the server
db.watch() – opens a change stream cursor for a database to report on all changes to its non-system collections.

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实在没办法了,挨个表导出一遍,在导入到目标数据库里了