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[trinity13]

Sum(orders!amount*0.2)
what does the above do?

 

[Chaim]

Multiplies the orders!amount value by 0.2 and sums all of those values.

Is orders a table? Should be using orders.amount rather than '!'

 

[trinity13]

Yes oders is a table. i do not knw why the author has used ! instead of
..