Question

the following trigger code applies a discount to the bill after a certain amount of visits but i’m getting the following error PLS-00103: Encountered the symbol “=” when expecting one of the following: := . ( @ % ; indicator

  CREATE OR REPLACE TRIGGER CHECK_DISCOUNT
  BEFORE INSERT OR UPDATE OF C_NO,BILL ON APPOINTMENT
  FOR EACH ROW

  DECLARE

  CURSOR C_APPTMNT
  IS
  SELECT C_NO,COUNT(C_NO) 
  FROM APPOINTMENT GROUP BY C_NO;

  V_C_NO APPOINTMENT.C_NO%TYPE;
  VISIT NUMBER(2);
  V_TEN NUMBER(3):=0.9;

  BEGIN

  OPEN C_APPTMNT;
  FETCH C_APPTMNT INTO V_C_NO,VISIT;

  IF VISITS = 3 AND :NEW.C_NO = V_C_NO THEN 
  :NEW.BILL := :NEW.BILL * V_TEN
  END IF;

  END;
  /

Getting a new error
PLS-00103: Encountered the symbol “END” when expecting one of the
following:
. ( * @ % & = – + ; < / > at in is mod not rem
<> or != or ~= >= <= <> and or like
between ||
The symbol “;” was substituted for “END” to continue.

Answer 1

Assignment needs a :

:NEW.BILL := :NEW.BILL * V_TEN;