COALESCE() Function in SQL Server
The SQL Server COALESCE() function is used to handle NULL values. The NULL values are replaced with the user-given value during the expression value evaluation process.
The SQL Server COALESCE function evaluates the expression in a definite order and always results first not null value from the defined expression list.
SQL Server COALESCE() Function
SQL Server COALESCE() Function returns the first non-null value from a list of expressions.
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