How does sql developer connect to oracle database?

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What are pl sql data types?

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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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Can %notfound return null after a fetch?

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What is normalization? How many normalization forms are there?

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Is it possible to pass parameters to triggers?

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what is sql and plsql

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Inline the values in PL/SQL, what does it mean.?

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What is the use of %rowtype?

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Why do we use subquery?

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What is meant by <> in sql?

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Is vs as in pl sql?

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