Question

 i have three tables file, expense and payment. I want fetch data from 3 table based on foreign key.

I have following three table

File Table

FileId
FileNo

Payment Table

  Id
  Amount
  FK_FileID

Expense Table

  Id
  Amount
  FK_FileID

I want output like

FileNo      Amount  IsPayment
10001         220         True
10001         120         False
10001         150         True

IsPayment is logical field if amount is from payment table IsPayment should be true and if it is from expense table it should be false.

Answer 1

I guess this query should do the trick:

SELECT ft.FileNo, pt.Amount, 'True' IsPayment
FROM FileTable ft
JOIN PaymentTable pt ON pt.FK_FileID = ft.FileId
UNION ALL
SELECT ft.FileNo, et.Amount, 'False' IsPayment
FROM FileTable ft
JOIN ExpenseTable et ON et.FK_FileID = ft.FileId