What is package in pl sql with an examples?

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What is dynamic SQl and how you will create and execute dynamic sql?

2 Answers   TCS,

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Why do we need pl sql?

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What is use of package in pl sql?

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

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State few characteristics of pl/sql?

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Should I use mbr or gpt?

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What is trigger price?

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What are the different ddl commands in sql?

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What are instead of triggers?

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what are the advantages of using stored procedures? : 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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