Hi All & Greetings.

I have created and run a query to show the result as a Crosstab query. I did
that by writing SQL as follows:

MAX(CASE WHEN myCol = 1 Then costA ELSE null END),
MAX(CASE WHEN myCol = 2 Then costA ELSE null END),
... and so on.

Now, when I run the query, it executes and gives me a result set. However,
it also generates a WARNING Message as follows:

Warning: Null value is eliminated by an aggregate or other SET operation.

i am having difficulty understanding this error / warning message and would
appreciate any help i helping me understand this.