Question

I have a table SINVOICE and another table called SINVOICE_LINE.

I need to put all columns of SINVOICE into SINVOICE_LINE.

I have created the corresponding columns and was trying to copy the values. The primary key of SINVOICE is SINVOICE_CODE, while the primary key for SINVOICE_LINE is a composite key (SINVOICE_CODE, SINVOICE_LINE_NUMBER).

I wrote the following query:

INSERT INTO SINVOICE_LINE (sinvoice.ITINERARY_CODE) 
   SELECT sinvoice_line.ITINERARY_CODE 
   FROM SINVOICE 
   INNER JOIN sinvoice_line ON sinvoice.sinvoice_code = sinvoice_line.sinvoice_code;

I get this error:

Cannot insert the value NULL into column SINVOICE_CODE, table SINVOICE_LINE; column does not allow nulls. INSERT fails.

I do not understand why I’m getting this error as I am not trying to insert any value in SINVOICE_CODE column.

Thanks!!!

Answer 1

Looks like you need UPDATE instead of INSERT here.

Try that:

UPDATE  SINVOICE_LINE
SET ITINERARY_CODE = sinvoice.ITINERARY_CODE
from SINVOICE 
WHERE sinvoice.sinvoice_code = sinvoice_line.sinvoice_code;