We are unable to solve your problem unless you can display
1)all Foreign Key relationships indicating how one Table-column can access
Primary key of another table2)It is impossible to aggregate PriceOfBook
information thru SUM or any other aggregator function(s) since PriceOfBook
column is
Thanks Mr. Martin.
I forgot to include the price column in table C.
The linkage between table A and table B is ID and IDPUBLISHER, while Table
B to C is the ISBN. Also sometimes there are some titles that are not sold
in a given month.
TABLE A (Publisher)
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ID :
