Question

I want to use two values, in two different tables, to be used as a total in a third table.

For instance:

1. table accommodation and flight
2. Add value from acc_price with value from flight_price
3. Add those values up to be used in table reservation.reservation_total

Things I’ve tried;

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SELECT  F.FLI_PRICE + AC.ACC_PRICEPN
INTO    R.SUBTOTAL
FROM    HOLIDAY_RESERVATION R, FLIGHT F, ACCOMMODATION AC;

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UPDATE HOLIDAY_RESERVATION HR
SET SUBTOTAL = (SELECT SUM (T.PRICE) FROM ( SELECT ACC_PRICEPN PRICE FROM ACCOMMODATION A
WHERE A.ACC_ID = HR.ACC_ID)

UNION ALL
SELECT FLI_PRICE PRICE FROM FLIGHT F1
WHERE HR.IN_FLIGHT_ID = F1.FLI_ID

UNION ALL
SELECT FLI_PRICE PRICE FROM FLIGHT F2
WHERE HR.OUT_FLIGHT_ID = F2.FLI_ID
) T
);

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Answer 1

Use SELECT INTO statement of PL-SQL….This will definately solve your problem…………