Question

I have a employee table, and a vacations table where each row represents a day they took for vacation.

I want to get all employees who have taken more vacation days that their maximum vacation days value.

employees:
employeeId
maxVacationDays

vacations:
employeeId
date_vacation_day_taken

Query I have now:

SELECT e.*
FROM employees e
         INNER JOIN vacations v ON (v.employeeId = e.employeeId)
WHERE e.isActive = true AND ( ???? > e.maxVacationDays)

So I need to get the count of rows from the vacations table for that employeeId.

Do I need a subquery for this?

(using sql2000)

Answer 1

Try this:

SELECT e.employeeId, v.maxVacationDays
FROM employees e
         INNER JOIN vacations v ON (v.employeeId = e.employeeId)
WHERE e.isActive = true
GROUP BY e.employeeId, v.maxVacationDays
HAVING COUNT(v.employeeId) > v.maxVacationDays