FIELD

Syntax

SQL

FIELD (str, str1, str2, ...)

Remarks

If all arguments are strings, then all arguments are compared as strings. If all arguments are numbers, they are compared as numbers. Otherwise, the arguments are compared as double.

If str is NULL, the return value is 0 because NULL fails equality comparison with any value.

Arguments

str: any string or binary object
str1, str2, … : list of strings or binary objects

Return Type

Integer

Example

SQL

SELECT FIELD('abra', 'cadabra', 'abra', 'abracadabra');

+-------------------------------------------------+
| FIELD('abra', 'cadabra', 'abra', 'abracadabra') |
+-------------------------------------------------+
|                                               2 |
+-------------------------------------------------+

Caution

Implicit Collation

When character_set_server is set to utf8, string literals with characters using 4-byte encoding are implicitly assigned binary collation and processed as a sequence of bytes rather than characters. This implicit conversion to binary collation causes string functions to return unexpected results. To avoid using implicit binary collation, either use explicit type casting or use database columns defined with the utf8mb4 character set.

For more information, refer to Implicit Collation in Special Cases.