NYSIIS

Return the phonetic representation of a string by applying the New York State Identification and Intelligence System (NYSIIS) algorithm.

NYSIIS(string)

This function returns a VARCHAR(6) data type.

For example, find names in a table that match the phonetic representation of some constants:
premdb=# select * from player 
where nysiis(firstname)=nysiis('Moe') or nysiis(firstname)=nysiis('Alex');
 playerid | teamid | seasonid | firstname | lastname | position |    dob     | weekly_wages | avg_mins_per_match | matches_played |  cob  
----------+--------+----------+-----------+----------+----------+------------+--------------+--------------------+----------------+-------
        6 |     25 |       27 | Alexis    | Sanchez  | F        | 1988-12-19 |       410000 |            71.2309 |           31.5 | Chile
       13 |     23 |       27 | Mo        | Salah    | F        | 1992-06-15 |       200000 |            82.2765 |           36.2 | Egypt
(2 rows)
Find rows in the team table where the phonetic representations of values in three different columns all match:
premdb=# select * from team where nysiis(name)=nysiis(city) and nysiis(city)=nysiis(stadium);
 teamid | htid | atid |     name     | nickname |  city   |       stadium        | capacity | avg_att 
--------+------+------+--------------+----------+---------+----------------------+----------+---------
     11 |   12 |   61 | Cardiff City | Clarets  | Cardiff | Cardiff City Stadium |    33280 |   0.000
(1 row)