I would like to make it possible to define a GroupClause using the Group function.
I would like to make it possible to define a GroupClause and a SelectClause simultaneously using the GroupSelect function.
I also think it is necessary to define a Sum function.
I would like to make it possible to define a GroupClause using the Group function. I would like to make it possible to define a GroupClause and a SelectClause simultaneously using the GroupSelect function. I also think it is necessary to define a Sum function.