How to find 3rd highest salary of an employee from the employee table in sql?
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I am creating an index on Emp table Empno column,if u using this indexed column in ur SELECT stmt. where clause,then how do u know that yr index will be working or nor? Thanks Advance...
four procedures is are there should i write their in a package
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When we can declare a column as Unique and Not Null both at the same time. What is the use pf Primary Key then?
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