Method to implement Case statement in universe

Hi,

I need to write CASE statement with use of three different table in Universe. I have written the query and the result set is fine in Toad. But I am
struck how to implement this logic in universe .

I have tried with below two option:

1st Method : Create one object written SQL along with Case statement in that object

( SQL Query……)

Result: Database Error:ORA-01427: Single row subquery returns more than one row

2nd Method Created one object and copied only Case statement

Case….

Result: Giving wrong result I guess its creating Cartesian product.

Can you please advise me how to implement the Case statement proper way in universe, I have tried my best but not working.

Also all the required table and joins already present in the universe.

Appreciate your help Gurus..