SQL Server COALESCE function | Practice SQL Queries | Scenario-18

Publié le: 10 janvier 2022
sur la chaîne: Valuetech Academy

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SQL COALESCE function | COALESCE function sql | COALESCE function in sql server
SQL Server COALESCE function - Evaluates the arguments in order and returns the current value of the first expression that initially doesn't evaluate to NULL. For example, SELECT COALESCE(NULL, NULL, 'third_value', 'fourth_value'); returns the third value because the third value is the first value that isn't null.

Syntax:
COALESCE ( expression [ ,...n ] )

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