Increment a value in Postgres

Question

I\'m a little new to postgres. I want to take a value (which is an integer) in a field in a postgres table and increment it by one. For example if the table \'totals\' had 2

Answer 1

UPDATE totals 
   SET total = total + 1
WHERE name = 'bill';

If you want to make sure the current value is indeed 203 (and not accidently increase it again) you can also add another condition:

UPDATE totals 
   SET total = total + 1
WHERE name = 'bill'
  AND total = 203;