What are the different types of tables in sql?

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What is trigger types in sql?

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How many types of indexes are there in sql?

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Is sql the best database?

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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 is a table in a database ? : Sql dba

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Is there any restriction on the use of union in embedded sql?

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Table Order_Name has a column Order_Date which gives the date & Time at which the order is passed.Find the table to write a query to find out the latest order.

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what is data integrity? : Sql dba

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What is group function in sql?

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how to extract a unit value from a date and time? : Sql dba

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What is sql partition function?

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