Hey everyone,
Is this the right way how to make a trigger in Oracle?
CREATE OR REPLACE TRIGGER "TRI_AMOUNT_REDUCTION"
BEFORE INSERT ON "PURCHASE"
FOR EACH ROW
BEGIN
IF (:NEW.CLIENTNO =SELECT C.CNAME, T.CLIENTNO, T.TOTAL FROM
CLIENT C, ( SELECT A.* FROM (SELECT CLIENTNO, SUM(AMOUNT) AS
TOTAL FROM PURCHASE GROUP BY CLIENTNO) A,(SELECT MAX(B.TOTAL) AS TOP FROM(SELECT
CLIENTNO, SUM(AMOUNT) AS TOTAL FROM PURCHASE GROUP BY CLIENTNO)B)C
WHERE A.TOTAL=C.TOP) T
WHERE C.CLIENTNO = T.CLIENTNO; ) THEN
:NEW.AMOUNT := AMOUNT - (AMOUNT * 0.1);
END IF;
END;
/
When I run this script, the server says "the trigger created with compilation errors"... I don't know what that exactly means
