Hello all, What should one do to force a specific pair of columns to be unique?
Lets say I have a table where 2 of the columns are "user" and "bookmark" and I want the database to force the pair (user,bookmark) to be unique so that a specific user doesn't insert the same bookmark twice or more. Is it possible to do this with DAL? The only solution I see is to explicitly check for the existence of that pair with a select.. Thanks a lot in advance, Tiago Almeida--
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