What is data control language?

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Can I learn sql in a week?

0 Answers  

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What is magic table?

6 Answers  

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Is pl sql different from sql?

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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Is not null in sql?

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What is synonyms?

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how to create table with in the procedure or function?

2 Answers   Genpact, HCL,

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What are the advantages of the packages

6 Answers   Oracle,

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What is compound trigger?

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State few characteristics of pl/sql?

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What is the difference between inner join and outer join?

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