Question about Having subquery

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Question about Having subquery

Author

Topic

Tenmakk
Starting Member

1 Post

Posted - 2012-04-05 : 08:31:37

I have this code:

 SELECT department.department_name,  count(employee.department_id) as number_of_employee
FROM 	employee, department
where department.department_id = employee.department_id
group by department.department_name, employee.department_id
having count(*) = (select max(count(employee.department_id)) from employee, department group by department.department_name, employee.department_id)

My program works as expected, but I'm unclear about what the "having" part does:


having count(*) = (select max(count(employee.department_id)) from employee, department group by department.department_name, employee.department_id)

Can someone help me out?

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-04-05 : 10:36:40

that will ensure you will details of department with highest employee count

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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