Question

I have 2 table with below structure :

Table 1 (Tb1) :

MasId Int, ItemId int, Quantity int
1          1           10
1          2           5
1          3           18
2          2           3
2          4           8

Table 2 (Tb2) :

MasId Int, ItemId int, Quantity int
10          1           10
10          2           5
10          3           18
6           2           3
6           4           8

I want to match Tb1 with Tb2 with ItemId and Quantity Columns. and get below query :

Tb1.MasId   Tb2.MasId
1           10
2           6

Table1 and Table2 contain about 2000000 record. and I use SQL Server 2012

EDIT 1

In Tb1 and Tb2 exists records such below :

Tb1:

MasId, ItemId, Quantity
3      15       10
3      16       2

Tb2:

MasId, ItemId, Quantity
20     15      10
20     18      5

Tb1.MasId and Tb2.MasId is not matched together.

Answer 1

The following query available as a SqlFiddle returns correct results even with tricky data:

SELECT
   Tb1MasId = A1.MasId,
   Tb2MasId = B1.MasId
FROM
   (
      SELECT
         MasID,
         Pattern = Checksum_Agg(Binary_Checksum(ItemId, Quantity))
      FROM dbo.Tb1
      GROUP BY MasId
   ) A1
   INNER JOIN (
      SELECT
         MasID,
         Pattern = Checksum_Agg(Binary_Checksum(ItemId, Quantity))
      FROM dbo.Tb2
      GROUP BY MasId
   ) B1
      ON A1.Pattern = B1.Pattern
      AND NOT EXISTS (
         SELECT * 
         FROM
            (
               SELECT A2.ItemID, A2.Quantity
               FROM dbo.Tb1 A2
               WHERE A1.MasID = A2.MasID
               UNION ALL
               SELECT B2.ItemID, B2.Quantity
               FROM dbo.Tb2 B2
               WHERE B1.MasId = B2.MasID
            ) X
         GROUP BY ItemID, Quantity
         HAVING Count(*) = 1
      );

The other answers on the page give incorrect results with the sample data in my SqlFiddle. Specifically, adding the following data to Tb2 will break X.L.Ant’s current query (which will show a false match 2, 8 due to not detecting that the 8, 3, 18 doesn’t belong).

INSERT dbo.Tb2
VALUES
   (7, 1, 10),
   (7, 2, 5),
   (7, 3, 17),
   (8, 3, 18),
   (8, 2, 3),
   (8, 4, 8);