Sql Inner Join Dont Have Result - sql

Question

First of all thanks a lot all replys and comments. I want to listed some fields from 4 tables. My question is if ODEMELER(Customer Payments) tables is dont have BORCLAR(Customers Debt) tables value. Namely;
MusteriID is = 1.
This Customer buy a item. I insert this process to BORCLAR table(BorcMusteriID=1) but ODEMELER table is null for this customer and OdemeMusteriID=!!! (null) because customer is not payment. And i want to list all of debts from all customers this code;
(SELECT SUM(BORCLAR.BorcTutari) FROM BORCLAR WHERE BORCLAR.BorcMusteriID=
ODEMELER.OdemeMusteriID)-
(SELECT SUM(ODEMELER.OdemeTutar) FROM ODEMELER where BORCLAR.BorcMusteriID=
ODEMELER.OdemeMusteriID))
AS [Borç Toplamı] FROM BORCLAR)
but this code is reply me only have BorcMusteriID,OdemeMusteriID valid records then my a lot of customers buy items but dont payment now. I dont list this. I try this code but it is wrong;
((SELECT SUM(BORCLAR.BorcTutari) FROM BORCLAR WHERE
BORCLAR.BorcMusteriID=ODEMELER.OdemeMusteriID)-
(SELECT SUM(ODEMELER.OdemeTutar) FROM ODEMELER where
BORCLAR.BorcMusteriID=
CASE (SELECT COUNT(*) FROM ODEMELER WHERE
ODEMELER.OdemeMusteriID=BORCLAR.BorcMusteriID)
WHEN 0 THEN ODEMELER.OdemeMusteriID = ODEMELER.OdemeMusteriID
ELSE ODEMELER.OdemeMusteriID=0 END)) AS [Borç Toplamı] FROM BORCLAR
Complete of my code;
set dateformat dmy
SELECT
(SELECT TOP 1 BORCLAR.BorcTarih FROM BORCLAR WHERE BORCLAR.BorcTarih <=
CONVERT(DATETIME, GETDATE(), 104)
and
BORCLAR.BorcMusteriID=MUSTERILER.MusteriID order by BORCLAR.BorcTarih desc)
as [TARİH],
MUSTERILER.Unvan,MUSTERILER.Ad + ' ' + MUSTERILER.Soyad AS [Adı Soyadı],
MUSTERILER.Mahalle +
' ' + MUSTERILER.Cadde + ' '+MUSTERILER.Sokak + ' ' + MUSTERILER.ApartmanAdi+
' NO:' +
MUSTERILER.Numara + ' KAT:' + MUSTERILER.Kat + ' DAİRE:'+
MUSTERILER.Daire AS [Adres],
ARACSUBETANIMLAR.AracSubeAdi as [Araç/Şube Adı],
((SELECT SUM(BORCLAR.BorcTutari) FROM BORCLAR WHERE BORCLAR.BorcMusteriID=
ODEMELER.OdemeMusteriID)-
(SELECT SUM(ODEMELER.OdemeTutar) FROM ODEMELER where BORCLAR.BorcMusteriID=
ODEMELER.OdemeMusteriID))
AS [Borç Toplamı] FROM BORCLAR
INNER JOIN ARACSUBETANIMLAR ON BORCLAR.BorcAracSube = ARACSUBETANIMLAR.AracSubeID
INNER JOIN ODEMELER ON BORCLAR.BorcMusteriID = ODEMELER.OdemeMusteriID
INNER JOIN MUSTERILER ON BORCLAR.BorcMusteriID = MUSTERILER.MusteriID
where
BORCLAR.BorcAracSube=ARACSUBETANIMLAR.AracSubeID
and
((SELECT SUM(BORCLAR.BorcTutari) FROM BORCLAR WHERE BORCLAR.BorcMusteriID=
ODEMELER.OdemeMusteriID)-
(SELECT SUM(ODEMELER.OdemeTutar) FROM ODEMELER where BORCLAR.BorcMusteriID=
ODEMELER.OdemeMusteriID)>0)
group by MUSTERILER.Unvan,MUSTERILER.Soyad,MUSTERILER.Ad,
ARACSUBETANIMLAR.AracSubeAdi,
ODEMELER.OdemeMusteriID,BORCLAR.BorcMusteriID,MUSTERILER.
Cadde,MUSTERILER.Daire,
MUSTERILER.ApartmanAdi,MUSTERILER.Mahalle,MUSTERILER.Kat,
MUSTERILER.Numara,MUSTERILER.Sokak,
MUSTERILER.MusteriID
Thanks a lot.

Answer 1

Looks like you want all customer balances regardless whether they have paid anything or not. You have purchases in one table (BORCLAR) and payments in the other table (ODEMELER). I am not sure what language you are speaking, but I guess "MusteriID" is the customer ID. You can use CTEs to get total purchases and payments by customer first and then join on that. Something like this:
;WITH BorclarTotal AS (
SELECT BORCLAR.BorcMusteriID, SUM(BORCLAR.BorcTutari) AS BorcTutari
FROM BORCLAR
GROUP BY BORCLAR.BorcMusteriID
), OdemelerTotal AS (
SELECT ODEMELER.OdemeMusteriID, SUM(ODEMELER.OdemeTutar) AS OdemeTutar
FROM ODEMELER
GROUP BY ODEMELER.OdemeMusteriID
)
SELECT bt.BorcMusteriID, bt.BorcTutari - ISNULL(ot.OdemeTutar, 0)
FROM BorclarTotal bt
LEFT JOIN OdemelerTotal ot ON bt.BorcMusteriID = ot.OdemeMusteriID
WHERE bt.BorcTutari != ISNULL(ot.OdemeTutar, 0);