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What are the type of joins? When do we use Outer and Self joins?
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Answer Posted / chandra rekha
Types of joins:
->Inner join
->Outer join->1.Left Outer join
2.Right Outer join
->Cross join
->Equi join
->Natural join
->Self join
Outer join:-When we need all rows from one table and some
rows from the other table
Self join:-When one row in a table correlated with other
rows in the same table
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