This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
My objective is to identify records in a table where there is more than record with the same <col1,col2> combination.
Using the having clause, I can only check for one column right, how to get similar feature if I want to check on a combination