I have tables contain 3 columns as a key, cannot have 2 rows with the same keys value.
The coulm are: YEAR_MONTH, Customer, product.
How do I by creating a view display all the rows that having more than row in the same keys
For Example, for the following table
YEAR_MONTH - Customer - Product
201803 cust1 prod1
201911 cust2 prod2
201803 Cust1 Prod1
the out view will be
201803 Cust1 Prod1 2(times)