Is sql a backend language?

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What are the types of join in sql?

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What are data types in pl sql?

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What is bulk collect in pl sql?

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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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real time applications of nullif?

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Is it possible for a table to have more than one foreign key?

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What SQL keyword must immediately follow the UNION ALL statement? 1. SELECT 2. INTO 3. ORDER 4. WHERE 5. JOIN

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What will be the output of the following String S = 1+2+"abc" S = ? String S1 = 1+2+"abc"+5+6 S1 = ?

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how to enter numeric values as hex numbers? : Sql dba

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Explain the savepoint statement.

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What are the operators in sql?

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