What is cursor and why it is required?

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What type of database is cloud sql?

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what is a record in a database ? : Sql dba

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What is int identity in 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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what is the difference between char and varchar data types? : Sql dba

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after tell procedure whole code he asked can i write the same way in a function

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What is cross join example?

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What is the least restrictive isolation level? : Transact sql

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What are the different datatypes available in PL/SQL?

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write a query to delete similar records in particular fields(columns) in different tables

6 Answers   TCS,

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what is 'force view'?

3 Answers   Cap Gemini, SPIC,

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