SQL Server COALESCE() Function

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SQL Server COALESCE() Function




❮ SQL Server Functions



Example


Return the first non-null value in a list:



SELECT
COALESCE(NULL, NULL, NULL, 'W3Schools.com', NULL, 'Example.com');

Try it Yourself »

Definition and Usage


The COALESCE() function returns the first non-null value in a list.



Syntax



COALESCE(val1,
val2, ...., val_n)


Parameter Values





Parameter Description
val1, val2, val_n Required. The values to test

Technical Details




Works in: SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data
Warehouse, Parallel Data Warehouse

More Examples



Example


Return the first non-null value in a list:



SELECT
COALESCE(NULL, 1, 2, 'W3Schools.com');

Try it Yourself »




❮ SQL Server Functions


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