Calculated Fields

SELECT
   RTRIM(Name),
   LTRIM(Name),
   TRIM(Name)
FROM country


RTRIM(Name) LTRIM(Name) TRIM(Name)
Aruba Aruba Aruba
Afghanistan Afghanistan Afghanistan
Angola Angola Angola
Anguilla Anguilla Anguilla
Albania Albania Albania
Andorra Andorra Andorra
Netherlands Antilles Netherlands Antilles Netherlands Antilles
United Arab Emirates United Arab Emirates United Arab Emirates
Argentina Argentina Argentina
...

RTRIM() function trims all spaces from the right of a value.
LTRIM() function trims all spaces from the left of a value.
TRIM() function trims both the right and left.