Question : How to define unique combination between 2 columns of 3

hi experts,

I have 3 columns of ID

the first one is the unique ID
the two others are foreign key

eg :

uniqueId | userId | ProfileId

I have to make the combination of USERID and PROFILE ID => UNIQUE

for instance :

1 | 1 | 1 : OK
2 | 1 | 1 : KO
2 | 2 | 1 : OK

Can you help me to figure it out?


Thank you,

Kind Regards.

Answer : How to define unique combination between 2 columns of 3

You can create a unique index against the two columns. In SSMS, open up the design of your table. Right click in the design tab and select Indexes/Keys. Click the Add button and in the Columns row, either type in your columns or use the "more" button (the ellipse) to view the Index Columns window.