Referencing

hi,

I think foreign key doesn't work if the referecing column is not a Primary key.
Is there any work around for this ? I need to check the column value in a X table, before inserting data into a Y table; but the column in X tabe is not a primary key.

Quote:

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foreign key

Integrity constraint that requires each value in a column or set of columns to match a value in a related table's UNIQUE or PRIMARY KEY.

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Trigger
before insert or update...
perform a query (for existence) on the other table to see if the value exists is one way.