How can we overcome recursive triggers in SQL?

1 Answers   iFlex,

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display your age in months?

2 Answers  

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what is the difference between trigger and storedprocedures

16 Answers   Tech Mahindra,

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What are the datatypes available in pl/sql ?

0 Answers  

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How to select all records from the table?

0 Answers  

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What is the difference between SQL Constraint and PL/SQL constraint.Pls give all the constraint name.

3 Answers   TCS,

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Where is pl sql used?

0 Answers  

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How many clustered indexes can you have?

0 Answers  

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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.

4 Answers  

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How does a covering index work?

0 Answers  

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What is a relationship and what are they?

0 Answers  

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Can cursors be part of a trigger body?

0 Answers  

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