Describe the Index, Types of index, At what situation we have used? Which one s better than others?

1 Answers   IBM, TCS,

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Is sql a programming?

0 Answers  

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Which is better join or subquery?

0 Answers  

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What is t-sql? : Transact sql

0 Answers  

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What are instead of triggers?

0 Answers  

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Is primary key clustered index?

0 Answers  

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Explain the purpose of %type and %rowtype data types?

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 try_catch block in procedure

0 Answers  

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What is the primary key?

0 Answers  

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select * from emp where sal in(select max(sal) from emp) here there is any limit for in operator how many values accpect ?

2 Answers  

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how can we replace the particular column value of a resulted set of executed query? I mean write down a sql query to chane the particular column's value of a resulted set of executed query

3 Answers  

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