what is the command used to fetch first 5 characters of the string? : Sql dba

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can a stored procedure call itself or recursive stored procedure? How much level sp nesting is possible? : 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.

4 Answers  

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How to write a procedure for displying the data in a TREE or (PARENT and CHILD ) relationship , for ex: A is the main project id, for this project B,C,D are sub tasks(sub project id's) for B the sub tasks are e,f,g and for c is h ,i ,j and for d is k,l,m now i need to display the o/p in a TREE fashion pls help me , thanks in advance surendra

2 Answers   Zensar,

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How to find the count of letter "L" in HELLO

7 Answers   HP,

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what is a trigger in mysql? : Sql dba

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Does sql support programming?

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Write a procedure to return the month and the number of developers joined in each month (cursor )

2 Answers   Tech Mahindra,

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What is query syntax?

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How to display Row Number with Records in Oracle SQL Plus?

0 Answers   MCN Solutions,

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how to get a list of columns in an existing table? : Sql dba

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Does view store data in sql?

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