Removes a symmetric key from the current database.
Transact-SQL Syntax Conventions
DROP SYMMETRIC KEY symmetric_key_name
Is the name of the symmetric key to be dropped.
If the key is open in the current session the statement will fail.
Requires CONTROL permission on the symmetric key.
The following example removes a symmetric key named GailSammamishKey6 from the current database.
CLOSE SYMMETRIC KEY GailSammamishKey6; DROP SYMMETRIC KEY GailSammamishKey6; GO