If it does, I don't see it.

>Bob,
>
>I don't 100% understand what you're asking (might not be your wording, I'm really tired) but does the NULLIF() function help you here?
>
>-Mike
>
>>Ok Folks,
>>
>>Here a problem I need help with, I am sure you will all rise to the occasion as you usually do.
>>
>>I am trying to create a query that summerizes employee tax data by taxing entity. Each taxing entity has its own tax_rule_id. I am getting the data for our pay histories table, which has a master table py_ehmast and a child table of py_ehtax with all the tax records. Each mast record is a payroll transaction/check.
>>
>>I need to not only summarize the data for each tax_rule_id but I need the summary for an entered date range, then month-to date, quarter-to-date and year-to-date. The user enteres the date range and I determine the dates from that. Not a problem.
>>
>>I also need the count of employees that had taxable wages for the period specified. So, I have all this working, here is a simplified version of the query...
>>
>>

>>SELECT
>>tax_rule_id
>>,count(distinct case when chkdate between @pdbegin and @pdend then ee_id else null end) count_pd
>>,count(distinct case when chkdate between @mbegin and @mend then ee_id else null end) count_mtd
>>,count(distinct case when chkdate between @qbegin and @qend then ee_id else null end) count_qtd
>>,count(distinct ee_id) count_ytd
>>FROM py_ehtax t
>>JOIN py_ehmast m ON t.ehmast_id = m.ehmast_id
>>WHERE m.chkdate BETWEEN @ybegin AND @yend
>>

>>
>>Ok, all that works great. The problem is. We allow the user to do adjustments. What that does is put records with negative values into the py_eh???? files. So, the sum will come out to the correct amount.
>>
>>So, it should be possible that for an ee_id for a specic tax_rule_id the sum for any of the for time ranges could be zero. In that case, I don't want the ee_id included in the count.
>>
>>If you understand this, do you have any ideas how I could do this.
>>
>>I thought to add to the WHERE something like
>>
>>

>>ee_id IN (SELECT ee_id, tax_rule_id, sum(tax_cur)
>>FROM py_ehtax t1
>>join py_ehmast m1 on t1.ehmast_id = m1.ehmast_id
>>WHERE ee_id = m.ee_id
>>     AND tax_rule_id = t.tax_rule_id
>>GROUP by ee_id, tax_rule_id
>>HAVING sum(tax_cur) > 0)
>>

>>
>>But, that would only apply to the YTD part...
>>
>>Thanks,
>>BOb