Question

I am calculating a column based on existing tables column, but I don’t know how to do that.

To explain my problem, let’s say I have a table which has two columns A and B, both are int. What I am doing right now is

Select A,B (A-B)as C from Table

The check I want to apply is

if C is less then Zero it should show Zero. rather then a negative
value.

What is the way to do this in SQL?

Answer 1

Select A,B,
CASE WHEN (A-B) < 0 THEN 0
ELSE (A-B)
END as C 
from Table