how to calculate the difference between two dates? : Sql dba

0 Answers  

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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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What is the difference between sql and isql*plus?

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What are the various restrictions imposed on view in terms of dml?

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What is the difference between join and union.

27 Answers   3i Infotech, ABC, Oracle, Polaris, TCS, XT Global,

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What are joins in sql?

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what is primary key? : Sql dba

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Are left and right joins the same?

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How do I edit a trigger in sql developer?

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write a query filter the null value data following source? name age john 30 smith null null 24 sharp 35 i want output name age john 30 sharp 35

1 Answers   TCS,

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What is PL/SQL Records?

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How subquery works in sql?

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