How to log in with one account and access a db with another account

Question

I log in to SSMS with one set of credentials, no problem. Then I want to access several databases in a script but one of the databases requires different credentials. Is there a way to specify different credentials within the script when accessing a database?

Answer 1

Yes, there is a way.

Try with EXECUTE AS , see the snippet below.

EXECUTE AS LOGIN = 'your login name';  
EXECUTE AS USER = 'your user name';  

See more on EXECUTE AS (Transact-SQL)