SELECT SUM returns a row when there are no records

Question

I\'m finding some problems with a query that returns the sum of a field from a table for all the records that meet certain conditions. I expected to receive a \"No records f

Answer 1

"I expected to receive a "No records found' when there were no records, but instead I'm receiving a null result."

Then do

SELECT SUM(dummy) FROM DUAL WHERE 1=2 HAVING COUNT(*) > 0

That is, specify that you only want to return a summary where there were rows that were considered.

SELECT SUM(dummy) FROM DUAL WHERE 1=2 HAVING SUM(dummy) IS NOT NULL

is similar, but the COUNT(*) would return a summary row if there were only rows for which dummy was null, while the latter would not.