Rimuove spazi in eccesso da stringa SQL

fonte: http://stackoverflow.com/questions/2455750/replace-duplicate-spaces-with-a-single-space-in-t-sql

SELECT REPLACE(REPLACE(REPLACE('some   string    with         many     spaces'
  , '  ', ' ' + CHAR(7) + CHAR(7)), CHAR(7) + CHAR(7) + ' ', ''), ' ' + CHAR(7) + CHAR(7), ' ') AS NewStr
--but it remove CHAR(7) + CHAR(7) from string

How it works:

Caution:
Char/string used to replace spaces shouldn’t exist on begin or end of string and stand alone.