help show help 
      
          
          

            
        show 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 <db name> set curent database to <db name> 
      
          
          

          
          

            
        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() 
      
          
        
      
      

      
      

        
     
   ======ddl
  
    
      
      

        

          

            
        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( [query] , [fields]) - 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([query]) 
      
          
          

          
          

            
        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 
      
          
        
        

          
            粘貼自： <
            
              http://www.mongodb.org/display/DOCS/DBA+Operations+from+the+Shell
            
            
              >