What are the types of triggers in sql?

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How do I start pl sql?

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What is the use of & in pl sql?

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how to create a new view in mysql? : Sql dba

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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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How to make a copy values from one column to another in sql?

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What is the use of count (*) in sql?

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How to call shell script from pl sql procedure?

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Which column of the user triggers data dictionary view displays the database event that will fire the trigger?

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What is pl/sql tables?

7 Answers   TCS,

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Does inner join remove duplicates?

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What is pl sql commands?

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