Is a foreign key always unique?
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What is the syntax and use of the coalesce function?
What is the difference between nested table and varray?
What is a trigger in pl/sql?
Why do we need view in sql?
Can instead of triggers be used to fire once for each statement on a view?
What are the different sql languages?
Is postgresql a server?
Explain the the update statement in sql?
Can you select everything, but 1 or 2 fields, without writer's cramp?
Why is %isopen always false for an implicit cursor?
Is it possible to use Transaction control Statements such a ROLLBACK or COMMIT in Database Trigger ? Why ?
How do I find duplicates in sql?