Is pl sql a programming language?

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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...

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What is view explain with example?

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Can you rollback after commit?

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What is output spooling in sql*plus?

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Can two tables have same primary key?

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Which is better stored procedure or query?

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When can we use the where clause and the having clause?

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Can we join more than 2 tables in sql?

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how to use 'mysql' to run sql statements? : Sql dba

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What is primary key sql?

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Hi, Can anybody please explain me the flow of the below query. I am not able to understand how this query works. This query is for finding the Nth highest salary.. SELECT DISTINCT (a.sal) FROM EMP A WHERE &N = (SELECT COUNT (DISTINCT (b.sal)) FROM EMP B WHERE a.sal<=b.sal); If N = 2 then second highest salary will be the o/p. If N = 3 then third highest salary will be the o/p. and so on.. Thanks, Nitin

5 Answers   Deloitte, Ness Technologies,

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