I need to know if I can do this in an UPDATE statement:
UPDATE users SET (\'field1\', \'field2\', \'field3\') VALUES (\'value1\', \'value2\', \'value3\'); <
If you want to update a record, it should look like this. You should very rarely want to update without a WHERE condition.
UPDATE users SET field1='value1', field2='value2', field3='value3' WHERE field1=1
SQL Fiddle