MySQL COALESCE() Function

Return the first non-null value in a list:

SELECT COALESCE(NULL, NULL, NULL, '91xjr.com', NULL, 'Example.com');

Definition and Usage

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

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

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

Works in:	From MySQL 4.0

Return the first non-null value in a list:

SELECT COALESCE(NULL, 1, 2, '91xjr.com');