I need to know if I can do this in an UPDATE statement:
UPDATE users SET (\'field1\', \'field2\', \'field3\') VALUES (\'value1\', \'value2\', \'value3\'); <
What you posted is not the correct syntax for UPDATE. To UPDATE your syntax is:
UPDATE
UPDATE users SET field1 = 'value1', field2 = 'value2', field3 = 'value3';
You will want to add a WHERE clause or this will UPDATE all records.
WHERE