How would you reference column values before and after you have inserted and deleted triggers?

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What is aggregate function in sql?

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function can return multiple value?how give give sample coding

2 Answers   3i Infotech, CTS, Excelity Global, UHG,

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What is pls integer?

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What are basic techniques of indexing?

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What is a recursive join sql?

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Explain some predefined exceptions.

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Which are sql * plus commands?

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what are %TYPE and %ROWTYPE? what is the difference?

7 Answers   ICICI, Saama Tech, Sail,

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What is the use of time stamp in select statement?

1 Answers   TCS,

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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 type of database is sql?

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