Unpivot table data - sql-server

Question

Sno Water Milk
1 50 100
2 22 120
3 11 142
i have this table.Now i want result like
Sno Type Qnty
1 Water 83
2 Milk 362
How can I please tell me.

Answer 1

SQL Server 2008 does not support this kind of statement.
You can achieve that in 2 ways:
using temporary table (variable type table)
DECLARE #products TABLE(Sno INT, Water INT, Milk INT)
INSERT INTO #products
VALUES (1, 50, 100), (2, 22, 120), (3, 11, 142)
SELECT ROW_NUMBER() OVER(ORDER BY SUM(Qnty)) AS RowNo, Product, SUM(Qnty) AS Qnty
FROM (
SELECT Product, Qnty
FROM (
SELECT *
FROM #products
) AS pvt
UNPIVOT (Qnty FOR Product IN ([Water],[Milk])) AS unpvt
) AS T
GROUP BY Product</pre>
or
;WITH T AS
(
SELECT Sno, Water, Milk
FROM (
SELECT 1 AS Sno, 50 AS Water, 100 AS Milk
UNION ALL
SELECT 2, 22, 120
UNION ALL
SELECT 3, 11, 142
) t (Sno, Water, Milk))
SELECT Sno = ROW_NUMBER() OVER(ORDER BY SUM(Upvt.Qnty)),
upvt.Type,
Qnty = SUM(Upvt.Qnty)
FROM T
UNPIVOT
( Qnty
FOR Type IN ([Water], [Milk])
) upvt
GROUP BY upvt.Type
ORDER BY Qnty;</pre>
Please,refer MSDN documentation.

Answer 2

The first step is to UNPIVOT your data:
WITH T AS
( SELECT Sno, Water, Milk
FROM (VALUES (1, 50, 100), (2, 22, 120), (3, 11, 142)) t (Sno, Water, Milk)
)
SELECT upvt.Sno,
upvt.Type,
Upvt.Qnty
FROM T
UNPIVOT
( Qnty
FOR Type IN ([Water], [Milk])
) AS upvt;
Which will give:
Sno Type Qnty
1 Water 50
1 Milk 100
2 Water 22
2 Milk 120
3 Water 11
3 Milk 142
You can then apply normal aggregation to this result:
WITH T AS
( SELECT Sno, Water, Milk
FROM (VALUES (1, 50, 100), (2, 22, 120), (3, 11, 142)) t (Sno, Water, Milk)
)
SELECT Sno = ROW_NUMBER() OVER(ORDER BY SUM(Upvt.Qnty)),
upvt.Type,
Qnty = SUM(Upvt.Qnty)
FROM T
UNPIVOT
( Qnty
FOR Type IN ([Water], [Milk])
) AS upvt
GROUP BY upvt.Type
ORDER BY Qnty;
Giving:
Sno Type Qnty
1 Water 83
2 Milk 362
EDIT
Based on your comment that you are using SQL Server 2005, not 2008 as indicated below is a full working example that will work on 2005:
DECLARE #T TABLE (Sno INT, Water INT, Milk INT);
INSERT #T (Sno, Water, Milk) VALUES (1, 50, 100);
INSERT #T (Sno, Water, Milk) VALUES(2, 22, 120);
INSERT #T (Sno, Water, Milk) VALUES(3, 11, 142);
SELECT Sno = ROW_NUMBER() OVER(ORDER BY SUM(Upvt.Qnty)),
upvt.Type,
Qnty = SUM(Upvt.Qnty)
FROM #T AS T
UNPIVOT
( Qnty
FOR Type IN ([Water], [Milk])
) AS upvt
GROUP BY upvt.Type
ORDER BY Qnty;
It was the table valued constructor I was using to create the sample data that was causing the error in 2005, nothing to do with the actual query that unpivots then sums the data.

Answer 3

This gives the result you asked for but I get the idea you want something a little more advanced. If so please elaborate.
SELECT 'water', sum(water) FROM table_name
UNION ALL
SELECT 'milk', sum(milk) FROM table_name