What is t sql in sql server?

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What is the least restrictive isolation level? : Transact sql

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What are different joins used in sql?

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how to include character strings in sql statements? : Sql dba

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How does sql profiler work?

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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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What are the key differences between SQL and PL SQL?

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Is primary key always clustered index?

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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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what is the difference between implicit and explicit trigger

2 Answers   Tech Mahindra,

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How do you add a column to a table?

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Which join is like an inner join?

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