Making Distinct Work
For those of you who have migrated from writing Classic CCL, you probably can't live without the "Select Distinct" approach
we've all used. For those of you who are using CCL for the first time in Millennium, consider the "Select Distinct" feature
as one more tool in your bag.
"Select Distinct" allows you to suppress duplicate rows of data from appearing in your output. It is dependent on and controlled
by the "Order" clause in your code. The fields you list in the "Order" clause are used to determine when a row of data is unique or
And that's all you used to need to know in Classic. In Millennium, however, you need to add a zero (0) as the last element
in the "Order" list.
Here's a code snippet to demonstrate:
Where (whatever your qualifications are)
So, what happens if you don't include the "0" in the "Order" clause? Distinct is then based on the uniqueness of the elements in the "Select" clause.