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How to create an aggregation measure that uses a SQL logical operator

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Last Modified: 2014-11-27
Is it possible to create an aggregation measure that uses a SQL logical operator in the Oracle BI Administration Tool (BMM model)?
 
When I create a new logical column, it seems that I can either create an aggregation measure, or use a logical operator, but not both.
If I select a "default aggregation rule", then "derived from existing columns using an expression" is grayed out.
If I select "derived from existing columns using an expression", then "default aggregation rule" is grayed out.
 
I need to count all records where the value = 000000000.  The SQL equivalent would be something like:
sum(case when student_oen IN ('000000000') then 1 else 0 end)
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