What is TABLE SPACE?

4 Answers   ABB, TCS,

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source destination distance chennai bangalore 500 bangalore chennai 500 hyd delhi 1000 delhi hyd 1000 bangalore hyd 800 Here chennai to bangalore and bangalore to chennai is same distance. and hyd and delhi also same criteria. Based on the distance i want to display only one row using sql query?

4 Answers   JPMorgan Chase,

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How pl/sql source code can be protected?

3 Answers  

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What is the Difference between Procedure and Function.Can we call a Function in a DML?

2 Answers   TCS,

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how is myisam table stored? : Sql dba

0 Answers  

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What is the purpose of normalization?

0 Answers  

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what are the demerits of sql?

1 Answers  

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What is the purpose of using pl/sql?

0 Answers  

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Explain raise_application_error.

0 Answers  

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Interchange the value of a column Gender in a table where values are Male and Female. So, where the value is Male, it should changed to Female and Female to Male.

4 Answers   Cap Gemini, IBM,

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What trigger means?

0 Answers  

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how to check the 3rd max salary from an employee table? One of the queries used is as follows: select sal from emp a where 3=(select count(distinct(sal)) from emp b where a.sal<=b.sal). Here in the sub query "select count(distinct(sal)) from emp b where a.sal<=b.sal" or "select count(distinct(sal)) from emp b where a.sal=b.sal" should reveal the same number of rows is in't it? Can any one here please explain me how is this query working perfectly. However, there is another query to get the 3rd highest of salaries of employees that logic I can understand. Pls find the query below. "select min(salary) from emp where salary in(select distinct top 3 salary from emp order by salary desc)" Please explain me how "select sal from emp a where 3=(select count(distinct(sal)) from emp b where a.sal<=b.sal)" works source:http://www.allinterview.com/showanswers/33264.html. Thanks in advance Regards, Karthik.

4 Answers  

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