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Editorial Team
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Asked: 2026-05-31T23:29:07+00:00

i am writing an update query and it is giving me errors, what i

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i am writing an update query and it is giving me errors, what i am trying to do is to take a value multiply it added to another value.

Original statement

The statement below works flawlessly,

UPDATE HOLIDAY_RESERVATION R SET SUBTOTAL = 
   NVL((SELECT F.FLI_PRICE FROM FLIGHT F WHERE F.FLI_ID = R.IN_FLIGHT_ID), 0) +
   NVL((SELECT F.FLI_PRICE FROM FLIGHT F WHERE F.FLI_ID = R.OUT_FLIGHT_ID), 0) +
   NVL((SELECT AC.ACC_PRICEPN FROM ACCOMMODATION AC WHERE AC.ACC_ID = R.ACC_ID), 0);

Modified version not working
This is the modified version, i want to multiply the first two select with a value in each field for in flight and outfight seats no.

UPDATE HOLIDAY_RESERVATION R SET SUBTOTAL = 
   NVL(((SELECT F.FLI_PRICE FROM FLIGHT F WHERE F.FLI_ID = R.IN_FLIGHT_ID), 0) * NVL(R.IN_FLIGHT_SEATS_NO,0)) +
   NVL(((SELECT F.FLI_PRICE FROM FLIGHT F WHERE F.FLI_ID = R.OUT_FLIGHT_ID), 0)* NVL(R.OUT_FLIGHT_SEATS_NO,0)) +
   NVL((SELECT AC.ACC_PRICEPN FROM ACCOMMODATION AC WHERE AC.ACC_ID = R.ACC_ID), 0);
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1 Answer

  1. Editorial Team

    NVL takes at least two parameters. But the NVLs at the beginning on the line have only one.

    You probably want:

    UPDATE HOLIDAY_RESERVATION R SET SUBTOTAL = 
   NVL((SELECT F.FLI_PRICE FROM FLIGHT F WHERE F.FLI_ID = R.IN_FLIGHT_ID), 0) * NVL(R.IN_FLIGHT_SEATS_NO,0) +
   NVL((SELECT F.FLI_PRICE FROM FLIGHT F WHERE F.FLI_ID = R.OUT_FLIGHT_ID), 0)* NVL(R.OUT_FLIGHT_SEATS_NO,0) +
   NVL((SELECT AC.ACC_PRICEPN FROM ACCOMMODATION AC WHERE AC.ACC_ID = R.ACC_ID), 0);

    Next time, please add the error message to the question.

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