The Subtle Differences Between COALESCE and ISNULL
See how ISNULL and COALESCE behave in different situations and ensure you know which one to pick when.
2025-04-18
4,769 reads
Coalesce()
2025-04-02
1,934 reads
Using Coalesce to Clean Up Reports
One of the lesser used functions is COALESCE(), used to allow you to return one value from a list of those that are potentially NULL. This short pieces gives a few examples where this is useful?
2021-08-16
4,241 reads
2018-05-18
973 reads
2016-01-29
1,681 reads
COALESCE in SQL Server
Sandeep Mittal provides an introduction to the COALESCE function and shows how to use it.
2015-11-25
4,572 reads
2013-09-20
2,710 reads
2013-06-03
2,604 reads
2012-11-09
2,209 reads
2012-10-17
2,501 reads
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Question of the Day
How Many Can Be the Greatest
I am trying to analyze a number of columns in a large table to determine the highest value for each row. In SQL Server 2022, we have the GREATEST function, which will return the greatest value from those columns passed in. How many columns can I include in an expression like this:
select GREATEST( col1, col2, col3, ...)See possible answers