Question:Point out the incorrect statement regarding group functions: 

A Group functions act on a group of rows 
B Group functions return one result for all the rows operated upon 
C Group functions ignore the null values 
D Stdev and variance are examples of group functions 
E One cannot combine group and single value functions in a query 
F Sum is not a group function 

+ Answer
D 

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Md. Habib Ullah

Editor, VCampus

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