Remove duplicate words from field in mysql

Question

I am wondering if it is possible to remove duplicate text using a mysql query from one field, or if a problem like this would be better solved using PHP.

I have a databa

Answer 1

Here is another version,you generate a large enough number of rows so you can CROSS JOIN progressively for each word then just GROUP_CONCAT will once again concatenate the separate words with the added DISTINCT parameter.

A primary or unqiue key to group by would be better in case of identical rows.

 SELECT GROUP_CONCAT(DISTINCT SUBSTRING_INDEX(SUBSTRING_INDEX(t.col, ' ', x.cifre), ' ', -1)) AS words
FROM t
INNER JOIN
(
    SELECT 1 + a.i + b.i * 10  cifre, b.i + a.i * 10  sute
    FROM (SELECT 0 AS i UNION SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9) a
    CROSS JOIN (SELECT 0 AS i UNION SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9) b
) x
ON (LENGTH(t.col) +1 - LENGTH(REPLACE(t.col, ' ', ''))) >= x.cifre
GROUP BY col

FIDDLE