Mysql:Trim all fields in database

Question

UPDATE mytable SET mycolumn= LTRIM(RTRIM(mycolumn));

works fine on trimming columns removing trailer spaces, but how can i adjust it to trim all column

Answer 1

Since the question asks for the whole database, here is the script that generates the required SQL. I skip the auto execute, execute it as you like.

-- Set your database name here
SET @my_database:='YOUR_DB_NAME';

SET SESSION group_concat_max_len = 1000000;

SELECT 
    CONCAT('UPDATE `', @my_database, '`.`', TABLE_NAME, 
            '` SET ', GROUP_CONCAT(
                CONCAT('`', COLUMN_NAME, '` = TRIM(`', COLUMN_NAME, '`)')
                ORDER BY ORDINAL_POSITION ASC),
            ';') AS `query`
FROM
    INFORMATION_SCHEMA.COLUMNS
WHERE
    TABLE_SCHEMA = @my_database
GROUP BY TABLE_NAME
ORDER BY TABLE_NAME ASC;

@ZweiStein Thanks.