dear all,
I have 2000 rows in my table and i want to have subtotal after every 20th row could anyone help me i do not know how to do it.
thanks in advance.
2 1602
First, you need a sequential number you can use to number the rows. If you don't have one, you can use the ROW_NUMBER() function or a ranking query.
After you have a sequential number, you can do math on that number to break it up into groups of 20. Then you can use the ROLLUP functionality of SQL Server to get subtotals on that new group field.
A simplified example is shown below - SELECT
-
FIELD1,
-
SUM(ROWNUM) AS SumOfRownum
-
-
FROM (
-
SELECT 1 AS ROWNUM, 'a' AS FIELD1 UNION ALL
-
SELECT 2, 'b' UNION ALL
-
SELECT 3, 'c' UNION ALL
-
SELECT 4, 'd' UNION ALL
-
SELECT 5, 'e' UNION ALL
-
SELECT 6, 'f' UNION ALL
-
SELECT 7, 'g' UNION ALL
-
SELECT 8, 'h' UNION ALL
-
SELECT 9, 'i' UNION ALL
-
SELECT 10, 'j'
-
) AS t
-
-
GROUP BY
-
ROLLUP(
-
(ROWNUM - 1) / 5 + 1,
-
FIELD1
-
)
- FIELD1 SumOfRownum
-
a 1
-
b 2
-
c 3
-
d 4
-
e 5
-
NULL 15
-
f 6
-
g 7
-
h 8
-
i 9
-
j 10
-
NULL 40
-
NULL 55
Be careful about this. Depending if you have an index or not and the type of index, your 20th row may varies.
Nevertheless Rabbit's code will work.
You may also try this: -
with x
-
as
-
(
-
select
-
rowid = row_number() over (order by UseAColumnThatYouCanUseToSort),
-
groupid = row_number() over (order by UseAColumnThatYouCanUseToSort)/20,
-
AnyNumericColumn
-
from YourTable
-
)
-
select
-
GroupId, sum(AnyNumericColumn)
-
from x
-
group by groupid
-
Happy Coding!!!
~ CK
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