Cannot GROUP by aggregate field (Error 1846)
You have attempted to use an aggregate function (MIN( ), MAX( ), SUM( ), AVG( ), COUNT( ), NPV( ), STD( ) or VAR( )) in a GROUP clause.
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You have attempted to use an aggregate function (MIN( ), MAX( ), SUM( ), AVG( ), COUNT( ), NPV( ), STD( ) or VAR( )) in a GROUP clause.