Calculating Consecutive Absences in SQL

Question

I need to calculate all Employees that have X number of consecutive absences within a date range in SQL.

We have an Absences Table with 1 record for each day an emp

Answer 1

This should work for you. GROUP BY on ConsecDates to find who was absent more than X number of times.

select a.*, 
        (
            select min(b.absenceDate) from tblAbsences b where a.employeeId = b.employeeId 
            and b.absenceDate >= a.absenceDate
            and not exists ( 
                select 1 from tblabsences c where c.employeeId = b.employeeId and dateadd( dd, 1, b.absenceDate) = c.absenceDate  
            )
) ConsecDates
from dbo.tblAbsences a
order by a.AbsenceDate asc