What is the difference between function and procedure in pl/sql?

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Why should I use postgresql?

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what is the command used to fetch first 5 characters of the string? : Sql dba

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What is recursive join in sql?

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How many types of relationship are there?

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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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Are sql views compiled?

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How can we solve sql error: ora-00904: invalid identifier?

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Do we need to create index on primary key?

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What is clustered, non-clustured and unique index. How many indexes can be created on a table ?

3 Answers   TCS,

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how do you control the max size of a heap table? : Sql dba

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What are the two types of exceptions.

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