2000元阿里云代金券免费领取，2核4G云服务器仅664元/3年，新老用户都有优惠，立即抢购>>>
阿里云采购季（云主机223元/3年）活动入口：请点击进入>>>，
阿里云学生服务器（9.5元/月）购买入口：请点击进入>>>，
- mongos> db.help()
- DB methods:
- db.addUser(username, password[, readOnly=false])
- db.adminCommand(nameOrDocument) - switches to 'admin' db, and runs command [ just calls db.runCommand(...) ]
- db.auth(username, password)
- db.cloneDatabase(fromhost)
- db.commandHelp(name) returns the help for the command
- db.copyDatabase(fromdb, todb, fromhost)
- db.createCollection(name, { size : ..., capped : ..., max : ... } )
- db.currentOp() displays currently executing operations in the db
- db.dropDatabase()
- db.eval(func, args) run code server-side
- 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.getCollectionNames()
- db.getLastError() - just returns the err msg string
- db.getLastErrorObj() - return full status object
- db.getMongo() get the server connection object
- db.getMongo().setSlaveOk() allow queries on a replication slave server
- db.getName()
- db.getPrevError()
- 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.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.removeUser(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.setProfilingLevel(level,<slowms>) 0=off 1=slow 2=all
- db.setVerboseShell(flag) display extra information in shell output
- db.shutdownServer()
- db.stats()
- db.version() current version of the server
- mongos>
- mongos> db.myCollection.help()
- DBCollection help
- db.myCollection.find().help() - show DBCursor help
- db.myCollection.count()
- db.myCollection.copyTo(newColl) - duplicates collection by copying all documents to newColl; no indexes are copied.
- db.myCollection.convertToCapped(maxBytes) - calls {convertToCapped:'myCollection', size:maxBytes}} command
- db.myCollection.dataSize()
- db.myCollection.distinct( key ) - e.g. db.myCollection.distinct( 'x' )
- db.myCollection.drop() drop the collection
- db.myCollection.dropIndex(index) - e.g. db.myCollection.dropIndex( "indexName" ) or db.myCollection.dropIndex( { "indexKey" : 1 } )
- db.myCollection.dropIndexes()
- db.myCollection.ensureIndex(keypattern[,options]) - options is an object with these possible fields: name, unique, dropDups
- db.myCollection.reIndex()
- db.myCollection.find([query],[fields]) - query is an optional query filter. fields is optional set of fields to return. e.g. db.myCollection.find( {x:77} , {name:1, x:1} )
- db.myCollection.find(...).count()
- db.myCollection.find(...).limit(n)
- db.myCollection.find(...).skip(n)
- db.myCollection.find(...).sort(...)
- db.myCollection.findOne([query])
- db.myCollection.findAndModify( { update : ... , remove : bool [, query:{}, sort: {}, 'new': false] } )
- db.myCollection.getDB() get DB object associated with collection
- db.myCollection.getIndexes()
- db.myCollection.group( { key : ..., initial: ..., reduce : ...[, cond: ...] } )
- db.myCollection.insert(obj)
- db.myCollection.mapReduce( mapFunction , reduceFunction , <optional params> )
- db.myCollection.remove(query)
- db.myCollection.renameCollection( newName , <dropTarget> ) renames the collection.
- db.myCollection.runCommand( name , <options> ) runs a db command with the given name where the first param is the collection name
- db.myCollection.save(obj)
- db.myCollection.stats()
- db.myCollection.storageSize() - includes free space allocated to this collection
- db.myCollection.totalIndexSize() - size in bytes of all the indexes
- db.myCollection.totalSize() - storage allocated for all data and indexes
- db.myCollection.update(query, object[, upsert_bool, multi_bool]) - instead of two flags, you can pass an object with fields: upsert, multi
- db.myCollection.validate( <full> ) - SLOW
- db.myCollection.getShardVersion() - only for use with sharding
- db.myCollection.getShardDistribution() - prints statistics about data distribution in the cluster
- db.myCollection.getSplitKeysForChunks( <maxChunkSize> ) - calculates split points over all chunks and returns splitter function
本文转自 hexiaini235 51CTO博客，原文链接：http://blog.51cto.com/idata/1098084，如需转载请自行联系原作者
