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|Java - Interview Questions and Answers|
|Ans. When a Table Join itself , it's a Self Join. For example - we like to know the pair of department names where first dept has lesser employees than the later.|
Select D1.name , D2.name from Dept D1, Dept D2 where D1.employee_count < D2.employee_count
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|What are Inner , Outer , Left and Right Joins in SQL ?|
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