Important Points About MySQL COALESCE() Function
- MySQL COALESCE() function is used to return the first non-NULL value from a list of expressions.
- If all the expressions evaluate to NULL, the COALESCE() function will return NULL.
- COALESCE() can be used to substitute NULL values in table columns with a default value or an expression.
- COALESCE() is more flexible than IFNULL() as it can handle any number of arguments, while IFNULL() only takes two arguments.
MySQL COALESCE() Function
The MySQL COALESCE() function returns the first non-null value in a list of expressions.