Which are the most commonly used sql joins?

1 Answers  

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Write a query to find the employees from EMP table those who have joined in Monday. (there is a column as hiredate which is a date column i.e values are like 03-DEC-81)

5 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 to run pl/sql statements in sql*plus?

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What is the best free sql database?

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What is a native sql query?

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What are the different dcl commands in sql?

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how will be date change into string

4 Answers  

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Is there a pl/sql pragma similar to deterministic, but for the scope of one single sql select?

0 Answers  

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how to delete duplicate rows from a specified table(only single table) how do you know which join is need to be used

11 Answers   UST,

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Can we call a function containing dml statements in a select query?

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Give an example of Full Outer Join?

1 Answers   IBM,

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