Per sostituire all spaces :
UPDATE `table` SET `col_name` = REPLACE(`col_name`, ' ', '')
Per rimuovere tutte le tabs caratteri :
UPDATE `table` SET `col_name` = REPLACE(`col_name`, '\t', '' )
Per rimuovere tutte le new line caratteri :
UPDATE `table` SET `col_name` = REPLACE(`col_name`, '\n', '')
http://dev.mysql.com/doc /refman/5.0/en/string-functions.html#function_replace
Per rimuovere first and last space(s) di colonna :
UPDATE `table` SET `col_name` = TRIM(`col_name`)
http://dev.mysql.com/doc /refman/5.0/en/string-functions.html#function_trim
