This field cannot be summarized

Question

I have a report where I need to calculate a total number of hours for the day and then for the week for each employee.  When trying to calculate the weekly total, I get an error message that says 'this field cannot be summarized'.  Below is the formula for the field that I am trying to summarize:
If {@ActHrsWorked} < 5.00 then {@ActHrsWorked} else
If {EMPLOYEE.SHIFT_ID} ='NO PARAMETERS' then {@ActHrsWorked} else
If {EMPLOYEE.SHIFT_ID} = 'OFFICE' then {@ActHrsWorked} else
{@ActHrsWorked} - .5
The @ActHrsWorked formula is as follows:
DateDiff ("n",Minimum ({Command.CLOCK_IN}, {Command.SHIFT_DATE}, "daily"), Maximum ({Command.CLOCK_OUT}, {Command.SHIFT_DATE}, "daily")) / 60
My employees clock in on labor tickets and can be clocked in on more than one at a time thus the need for the Minimum Clock_In and Maximum Clock_Out.
Please let me know if I can provide any more information.  Thank you in advance for your help!!!

Answer 1

Anne,
I don't have any sample data to test with but it looks fairly straight forward.
The following SQL will add 2 additional columns to to your data set... MIN_CLOCK_IN and MAX_CLOCK_OUT
SELECT
lt.EMPLOYEE_ID,
lt.SHIFT_DATE,
lt.EARNING_CODE_ID,
lt.HOURS_WORKED,
lt.ACT_CLOCK_IN,
lt.ACT_CLOCK_OUT,
lt.DESCRIPTION,
lt.CLOCK_IN,
lt.CLOCK_OUT,
mm.MIN_CLOCK_IN,
mm.MAX_CLOCK_OUT,
lt.TRANSACTION_ID 
FROM LABOR_TICKET AS lt
INNER JOIN (
     SELECT
     EMPLOYEE_ID,
     SHIFT_DATE,
     DESCRIPTION,
     Min(ACT_CLOCK_IN) AS MIN_CLOCK_IN,
     Max(ACT_CLOCK_OUT) AS MAX_CLOCK_OUT
     FROM LABOR_TICKET
     WHERE SHIFT_DATE>={?StartDate} and SHIFT_DATE <={?ZEndDate}
     GROUP BY EMPLOYEE_ID, SHIFT_DATE, DESCRIPTION) AS mm
ON lt.EMPLOYEE_ID = mm.EMPLOYEE_ID AND lt.SHIFT_DATE = mm.SHIFT_DATE AND lt.DESCRIPTION = mm.DESCRIPTION
WHERE SHIFT_DATE>={?StartDate} and SHIFT_DATE <={?ZEndDate}
Here's what it's doing...
It's using a sub-query to pull in Min & Max aggregates of the ACT_CLOCK_IN & ACT_CLOCK_OUT (respectively), grouped on EMPLOYEE_ID, SHIFT_DATE & DESCRIPTION.
The sub-query is then joined back to the original query so that you'll have the Min & Max values at the detail row level
HTH,
Jason