Question

I need to compare the final balances of two tables from different clients grouped by ID. The tables have the same ID’s But one has multiple ID entries and the other does not. I need to sum row from the table with multiple entries so I have just one final number to do calculations with.

Table1:

ID,    cost,    traceNumber,   TheDate
1,     200,     1001,          10/07/2011
1,     -20,     1002,          10/08/2011
1,     130,     1003,          10/10/2011
2,     300,     1005,          10/10/2011

Table2:

ID,    cost
1,     200
2,     300

Result for ID 1, would be 310 compared to table2 of 200 with a difference of 110

The Query will look something like this.

SELECT DISTINCT
    Table1.ID,
    Table1.TheDate ,
    Table1.traceNumber,
    Table1.[cost] AS Frost_Balance, 
    SUM(Table1.[cost]) AS SUM_Frost_Balance, 
    Table2.[cost] AS Ternean_Balance, 
    SUM(Table1.[cost]) - Table2.[cost] AS Ending_Balance, 
FROM  
    Table1 
    INNER JOIN Table2 ON Table1.ID =Table2.CustomerID 
GROUP BY 
    dbo.Frost.ID

The query has to display multiple columns in the result set because it is going to be used to report on. I tried grouping by all columns in the result set but that gave me wrong results. Is there another way to compute the column that needs to be summed up?

Answer 1

Is this what you’re trying to do?

-- Data setup
CREATE TABLE [Table1]
(
    [ID] INT,
    [cost] INT,
    [traceNumber] INT,
    [TheDate] DATE
)

INSERT [Table1]
VALUES  (1, 200, 1001, '10/07/2011'),
        (1, -20, 1002, '10/08/2011'),
        (1, 130, 1003, '10/10/2011'),
        (2, 300, 1005, '10/10/2011')

CREATE TABLE [Table2]
(
    [ID] INT,
    [cost] INT
)

INSERT [Table2]
VALUES  (1, 200),
        (2, 300)

-- Query
;WITH [cteTable1Sum] AS
(
    SELECT [ID], SUM([cost]) AS [cost]
    FROM [Table1]
    GROUP BY [ID]
)       
SELECT  [Table1].[ID], 
        [Table1].[TheDate], 
        [Table1].[traceNumber],
        [Table1].[cost] AS [Frost_Balance],
        cte.[cost] AS [SUM_Frost_Balance],
        [Table2].[cost] AS [Ternean_Balance],
        cte.[cost] - [Table2].[cost] AS [Ending_Balance]
FROM [Table1]
INNER JOIN [Table2]
    ON [Table1].[ID] = [Table2].[ID]
INNER JOIN [cteTable1Sum] cte
    ON [Table1].[ID] = cte.[ID]