aochss (8/9/2013)
Great question (I like that you included explanations of the build in function).However, I cannot see the use/value of the "NULLIF" construct. In what situations would you use something like this?
Has anyone used this in a production environment?
Anton
Thanks for the kind remarks.
NULLIF can be very useful, consider this one example:
SELECT margin_percent = 100 * FLOOR(margin / cost)
What happens when cost is zero? it blows up!
Now this
SELECT margin_percent = 100 * FLOOR(margin / ISNULL(NULLIF(cost,0),margin))
Now, if the cost is zero it is replaced by the margin value and the calculation returns 100%, which is what you would want.
MM
select geometry::STGeomFromWKB(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