CODEWITHSUNDEEP
sql-serverjoin
N K
N K

Reputation: 3327

Join tables with Aggregate value

I've two tables, named Table-A and Table-B. Please refer given tables . I want to join these after taking the aggregate of 'Value' column in both tables. For eg;

TABLE-A

     Name    Value1
      ABC     10
      ABC     18
      ABC     12
      DEF     5
      XYZ     15
      XYZ     16

TABLE-B

     Name    Value2
      ABC     15
      ABC     5
      XYZ     9

My expected result is,

Result

     Name    Value1   Value2
      ABC      40       20
      DEF      5        0
      XYZ      31       9

Hope you understand my question. Any help will be appreciated.

Upvotes: 10

Views: 13403

Answers (3)

Pavel
Pavel

Reputation: 1647

SELECT [TAB-A].NAME, VALUE1, VALUE2 FROM
(SELECT NAME, SUM(VALUE1) VALUE1 FROM [TABLE-A] GROUP BY NAME) [TAB-A] LEFT JOIN
(SELECT NAME, SUM(VALUE2) VALUE2 FROM [TABLE-B] GROUP BY NAME) [TAB-B]
ON [TAB-A].NAME = [TAB-B].NAME

Upvotes: 1

Devart
Devart

Reputation: 121902

Try this one -

SELECT 
      a.Name
    , Value1 = ISNULL(Value1, 0)
    , Value2 = ISNULL(Value2, 0)
FROM (
    SELECT 
          Name
        , Value1 = SUM(Value1)
    FROM dbo.[TABLE-A]
    GROUP BY Name
) a
LEFT JOIN (
    SELECT 
          Name
        , Value2 = SUM(Value2)
    FROM dbo.[TABLE-B]
    GROUP BY Name
) b ON a.Name = b.Name

Upvotes: 11

Gatej Alexandru
Gatej Alexandru

Reputation: 92

SELECT  
      COALESCE(A.Name, B.Name)
    , (CASE WHEN A.value IS NULL THEN 0 ELSE A.value END) AS Value1
    , (CASE WHEN B.value IS NULL THEN 0 ELSE B.value END) AS Value2 
FROM (
    SELECT Name, SUM(Value) AS Value 
    FROM #A GROUP BY Name
) AS A 
FULL JOIN (
    SELECT Name, SUM(Value) AS Value 
    FROM #B GROUP BY Name
) AS B ON A.Name = B.Name

DROP TABLE #A
DROP TABLE #B

Upvotes: 1

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