IFNULL (expr1, expr2)
if expr1 is not NULL, IFNULL () returns expr1, otherwise it returns expr2.
The IFNULL () Returns a string or numeric values, depending on the context it is used.
IFNULL (expr1, expr2)
if expr1 is not NULL, IFNULL () returns expr1, otherwise it returns expr2.
The IFNULL () Returns a string or numeric values, depending on the context it is used.