如果搜索字符串不在 FIELD() 函数中作为参数提供的字符串列表中，MySQL 将返回什么？

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