What MySQL Returns When Search String Is Not in FIELD Function

Suppose if the search string is not in the list of strings provided as the arguments in FIELD() function then MySQL will return 0 as output.

Example

mysql> Select FIELD('Ram','New','Delhi');
+----------------------------+
| FIELD('Ram','New','Delhi') |
+----------------------------+
|                         0  |
+----------------------------+
1 row in set (0.00 sec)