Update if different/changed

Question

Is it possible to perform an update statement in sql, but only update if the updates are different?

for example

if in the database, col1 = \"hello\"

Answer 1

CREATE OR REPLACE PROCEDURE stackoverflow([your_value] IN TYPE) AS
BEGIN
   UPDATE   [your_table] t
     SET t.[your_collumn] = [your_value]
   WHERE t.[your_collumn] != [your_value];
  COMMIT;


EXCEPTION
 [YOUR_EXCEPTION];

END stackoverflow;