Question

I have the following table

Select * from Peeps
Id Name Age 
1  Sam  16
2  John NULL


Select 
Name, 
Age,
(If Age=NULL,1,0) AS Z
from peeps;

Results:

+------+------+---+
| name | age  | Z |
+------+------+---+
| Sam  |   16 | 0 |
| John | NULL | 0 |
+------+------+---+

Desired Results

+------+------+---+
| name | age  | Z |
+------+------+---+
| Sam  |   16 | 0 |
| John | NULL | 1 |
+------+------+---+

Answer 1

Try:

Select 
Name, 
Age,
(If Age IS NULL,1,0) AS Z
from peeps;

http://dev.mysql.com/doc/refman/5.1/en/working-with-null.html