Building SQL Query - asp.net

Question

I need some help to build SQL Query. I have table having data like:
ID Date Value1 Value2 Code
1 12/01/2009 4 3.5 abc
2 12/02/2009 3 4.0 abc
3 11/03/2009 6 8.5 xyz
4 11/01/2009 2 5.5 abc
5 11/02/2009 4 6.0 xyz
6 12/03/2009 5 7.0 xyz
I need to show result something like...
---------
Code | Data | November(Sum of Values in month) December Jan Feb
abc | Value1 | 2 7 0 0
| Value2 | 5 7 0 0
xyz | Value1 | 10 5 0 0
| Value2 | 14 7 0 0
----------
I need sum of value in each month as in above data in columns group by code.

Answer 1

Have a look at this solution, and let me know what you think.
You have to use both PIVOT and UNPIVOT in this instance to get the result you are looking for. Hope this helps.
DECLARE #Table TABLE(
ID INT,
Date DATETIME,
Value1 INT,
Value2 FLOAT,
Code VARCHAR(10)
)
INSERT INTO #Table (ID,Date,Value1,Value2,Code) SELECT 1,'12/01/2009',4,3,'abc'
INSERT INTO #Table (ID,Date,Value1,Value2,Code) SELECT 2,'12/02/2009',3,4,'abc'
INSERT INTO #Table (ID,Date,Value1,Value2,Code) SELECT 3,'11/03/2009',6,8,'xyz'
INSERT INTO #Table (ID,Date,Value1,Value2,Code) SELECT 4,'11/01/2009',2,5,'abc'
INSERT INTO #Table (ID,Date,Value1,Value2,Code) SELECT 5,'11/02/2009',4,6,'xyz'
INSERT INTO #Table (ID,Date,Value1,Value2,Code) SELECT 6,'12/03/2009',5,7,'xyz'
;WITH UnPvt AS (
SELECT *
FROM (
SELECT Code,
DATENAME(MM, Date) MonthNameVal,
SUM(Value1) Value1,
SUM(Value2) Value2
FROM (
SELECT Code,
Date,
CAST(Value1 AS FLOAT) Value1,
Value2
FROM #Table
) v
GROUP BY Code,
DATENAME(MM, Date)
) Sub
UNPIVOT
(
Vals FOR RowValues IN (Value1, Value2)
) AS UnPvt
)
SELECT *
FROM UnPvt
PIVOT (
SUM(Vals)
FOR MonthNameVal IN ([January],[February],[March],[April],[May],[June],[July],[August],[September],[October],[November], [December])
) AS pvt
ORDER BY Code, RowValues
Have a look at
SQL SERVER – PIVOT and UNPIVOT Table
Examples
Give the New PIVOT and UNPIVOT
Commands in SQL Server 2005 a
Whirl
Using PIVOT and UNPIVOT

Answer 2

This isn't quite what you asked for because the number of columns is fixed, but I think it's a better way to what you want in SQL:
SELECT Code, 'Value1' As Data, MONTH(Date) AS Month, YEAR(Date) AS Year, SUM(Value1) AS Sum
FROM Table1
GROUP BY Code, MONTH(Date), YEAR(Date)
UNION ALL
SELECT Code, 'Value2' As Data, MONTH(Date) AS Month, YEAR(Date) AS Year, SUM(Value2) AS Sum
FROM Table1
GROUP BY Code, MONTH(Date), YEAR(Date)
ORDER BY Code, Data, Month, Year
Example output:
Code Data Month Year Sum
abc Value1 11 2009 2
abc Value1 12 2009 7
abc Value2 11 2009 5
abc Value2 12 2009 7
xyz Value1 11 2009 10
xyz Value1 12 2009 5
xyz Value2 11 2009 14
xyz Value2 12 2009 7
I'd recommend that you use a bit of non-SQL code to reformat the result into exactly what you asked for before displaying it to the user rather than trying to return a variable number of columns in SQL.