EXEC sp_msforeachdb

 Below is the example.



The below query will change the owner of all the databases to sa at a time 
sp_msforeachdb @command1='USE ?;IF DB_ID(''?'') > 4
begin
EXEC sp_changedbowner ''sa''
end'
Getting all the table information at time 
sp_msforeachdb @command1='USE ?;SELECT * FROM sys.Tables'

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