Question

I am wondering what I am doing wrong. I have 2 tables used in this problem: ODETAILS and PARTS.
ODETAILS has the following columns: ONO, PNO, QTY, COST

PARTS has the following columns: PNO, PNAME, QOH, PRICE, OLEVEL

I am trying to update the column COST in ODETAILS so that the COST = QTY * PRICE

PRICE is found in PARTS. But how can I connect those two tables. I am having a brain fart because this is what I tried:

UPDATE ODETAILS
SET COST = QTY * 
    (SELECT PRICE
    FROM PARTS
    WHERE PNO =
        (SELECT PNO
        FROM ODETAILS
        WHERE NOT PNO= NULL
        )
    )
WHERE NOT PNO = NULL;

Answer 1

figured it out. thanks anyway.

UPDATE ODETAILS
SET COST = QTY * (
   SELECT PRICE
   FROM PARTS
   WHERE (PARTS.PNO=ODETAILS.PNO)
);