I want to know what this query will do:

```
UPDATE users SET
PaymentAmount = PaymentAmount + TempPaymentAmount,
PaymentDuration = PaymentDuration + TempPaymentDuration,
TempPaymentAmount = NULL,
TempPaymentDuration = NULL
WHERE UserID = 1234

```

You'll notice that I am trying to copy a value from temp column to the original column and nullify it at the same time. I am wondering if the query will do what I expect.