What does joining a thread mean?

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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.

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How do you declare a user-defined exception?

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What are views in sql?

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Why is sql important?

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Why functions are used in sql?

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What is the command used to fetch first 5 characters of the string?

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Why do we use procedures?

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What is procedure function?

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i have a table with fields(id,name,accnt_type)and in account type are FD,SAVING,RD. Write a query to get How many number of People are in each type of Account?

6 Answers   Fidelity, IBM,

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What is an oracle stored procedure?

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What is an inner join sql?

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