mongoDB操作命令，摘自官方helper
help show helpshow dbs show database names
show collections show collections in current database
show users show users in current database
show profile show most recent system.profile entries with time >= 1ms
use set curent database to
db.addUser (username, password)
db.removeUser(username)
db.cloneDatabase(fromhost)
db.copyDatabase(fromdb, todb, fromhost)
db.createCollection(name, { size : ..., capped : ..., max : ... } )
db.getName()
db.dropDatabase()
// runs the collstats] command on each collection in the database
db.printCollectionStats()
db.currentOp() displays the current operation in the db
db.killOp() kills the current operation in the db
db.getProfilingLevel()
db.setProfilingLevel(level) 0=off 1=slow 2=all
db.getReplicationInfo()
db.printReplicationInfo()
db.printSlaveReplicationInfo()
db.repairDatabase()
db.version() current version of the server
db.shutdownServer()db.foo.drop() drop the collection
db.foo.dropIndex(name)
db.foo.dropIndexes()
db.foo.getIndexes()
db.foo.ensureIndex(keypattern,options) - options object has these possible
fields: name, unique, dropDups
db.foo.find( , ) - first parameter is an optional
query filter. second parameter
is optional
set of fields to return.
e.g. db.foo.find(
{ x : 77 } ,
{ name : 1 , x : 1 } )
db.foo.find(...).count()
db.foo.find(...).limit(n)
db.foo.find(...).skip(n)
db.foo.find(...).sort(...)
db.foo.findOne()
db.foo.getDB() get DB object associated with collection
db.foo.count()
db.foo.group( { key : ..., initial: ..., reduce : ...[, cond: ...] } )
db.foo.renameCollection( newName ) renames the collection
db.foo.stats()
db.foo.dataSize()
db.foo.storageSize() - includes free space allocated to this collection
db.foo.totalIndexSize() - size in bytes of all the indexes
db.foo.totalSize() - storage allocated for all data and indexes
db.foo.validate() (slow)
db.foo.insert(obj)
db.foo.update(query, object[, upsert_bool])
db.foo.save(obj)
db.foo.remove(query) - remove objects matching query
remove({}) will remove all
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