FIELD() FUNCTION
The MySQL FIELD function is used to get the position of a value in a list of values. The various versions of MySQL support the FIELD function, namely, MySQL 5.7, MySQL 5.6, MySQL 5.5, MySQL 5.1, MySQL 5.0, MySQL 4.1, MySQL 4.0 and MySQL 3.23.
Syntax:
FIELD( value, val_1, val_2, ... val_n )
Parameters:
value: It is used to specify the value to search.
val_1, val_2, … val_n: It is used to specify the values to be searched.
Example:
mysql> SELECT FIELD ( ‘A’, ‘1’, ‘A’, ‘2’, ‘B’, ‘3’, ‘C’ );
Output:
2
Explanation:
The value’s position is returned.