IBM Cognos Report Studio: Expression Builder Syntax -

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i working report studio , need create few expressions cross-tab query. attempting group orders age groups (for rows in cross-tab). build these groups trying create expression following:

select [sql5].[outbound_order_id], [sql5].[priority]  [sql5].[outbound_order_line_id] =1 , [sql5].[age] <= 2

although works in sql platforms, cognos not validating expression. while ibm has lot of material calculations, have been unable locate syntax examples. can experience in report studio provide syntax example perform expression such above? in advance.

what's validation error get? appears forgot part

select [sql5].[outbound_order_id], [sql5].[priority]  [sql5] [sql5].[outbound_order_line_id] =1 , [sql5].[age] <= 2

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