Important Points About SQL Server COALESCE() Function
- The COALESCE() function in SQL Server is used to handle NULL values effectively by replacing them with user-defined values during expression evaluation.
- All expressions within the COALESCE() function must have the same data type to ensure proper evaluation and return of values.
- The COALESCE() function is available in SQL Server (all supported versions), Azure SQL Database, Azure SQL Managed Instance, Azure Synapse Analytics, and Parallel Data Warehouse.
SQL Server COALESCE() Function
SQL Server COALESCE() Function returns the first non-null value from a list of expressions.