Drop database
      by sij /
      
    
    Display all databases
> show dbs
admin   0.000GB
config  0.000GB
local   0.000GB
onews   0.001GB
Connect with the db to delete
use onews
Delete the db
db.dropDatabase()
Verify the result
> show dbs
admin   0.000GB
config  0.000GB
local   0.000GB