What is latest version of sql?

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Define implicit and explicit cursors.

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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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What do we need to check in database testing?

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What are the types of queries in sql?

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Why is pl sql used?

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What are the main features of cursor?

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How do you declare a user-defined exception?

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When sql appeared?

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What is the difference between numeric and autonumber?

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Why left join is used in sql?

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what is the need of the cursor attribute notfound..(because using found attribute we can complete the task......found + negation operator = not found )

2 Answers   Tech Mahindra,

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