Question

Two table:

    Customer: Cus_ID, Status
    Payment: Pay_ID, Cus_ID, PaidOrNot

Requirement is when setting “Yes” to “PaidOrNot”, then automatically set the Customer Status to “VIP”.

    CREATE TRIGGER AutoVIP

    AFTER UPDATE OR INSERT ON Payment

    BEGIN

        IF PaidOrNot = Yes
        THEN UPDATE Customer set Status = VIP

    END

I am quite not familiar with SQL syntax, this trigger seems not working, can you help me to amend it? Thanks.

Answer 1

What happens if you try this?

I have deliberately tried to make it as self-explanatory as possible.

CREATE TRIGGER AutoVIP
ON Payment
AFTER INSERT, UPDATE
AS
BEGIN
  DECLARE @PaidOrNot VARCHAR(3) -- Or whatever datatype it is really
  DECLARE @CustomerId INT -- Or whatever datatype it is
  SET @PaidOrNot = (SELECT PaidOrNot FROM INSERTED)
  SET @CustomerId = (SELECT Cus_ID FROM INSERTED)
  IF @PaidOrNot = 'Yes'
  BEGIN
    UPDATE Customer set Status = VIP WHERE Cus_ID = @CustomerId
  END
END