How to do a disctinct count of null values?

How to do a disctinct count of null values?

I have a report that I need the distince count of employee numbers, but I need to exclude the null values (as they are not to be included int a given category).



Thank you very much.
kgittingerAsked:
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peter57rCommented:
It sounds like you want to get this count at group level.
So create a formula field for the group header...

WhilePrintingrecords;
Numbervar nullKnt:=0;
""

In the detail line add formula field..

WhilePrintingrecords;
Numbervar nullKnt;
if isnull(table.employee}) then nullKnt:=1;
""

In the group  footer;

WhilePrintingrecords;
Numbervar nullKnt;
distinctCount({Table.Employee}, {table.groupfield}) - nullKnt
0

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waltersnowslinarnoldCommented:
This sample query could well assist you;

SELECT SUM(CASE WHEN col IS NULL THEN 1 ELSE 0 END) NullCount
FROM tableName
0
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