show dbs show database names

			
> show dbs
local	(empty)
logging	0.203125GB
test	0.203125GB
			
			

show collections show collections in current database

			

> show collections
bios
system.indexes
			
			

另一種用法是show tables

			
> show tables
bios
system.indexes
			
			

show users show users in current database

show profile show most recent system.profile entries with time >= 1ms

			
> show profile
db.system.profile is empty
Use db.setProfilingLevel(2) will enable profiling
Use db.system.profile.find() to show raw profile entries