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Kindly advise , How to create query in sqlserver for below issue,


Kindly advise , How to create query in sqlserver for below issue,

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s.chandrahasan
s.chandrahasan
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Dear Team ,

Kindly advise , How to create query in sqlserver for below issue,

I Have Table with below details

Id Name Value1 value2 Total(Value1+Value2) PreviousRowId
1 A 10 0 10 0
2 B 5 1
3 C 6 2
4 D 7 3
5 E 8 4
6 F 5 5


Qustions :
1 . 1st row Total comes to second row Value1
then calculate 2nd row total . then its comes to 3rd row Value1 column. and its continue for all rows.
how to write the query for this issue?

Note : Link between all rows ==> Id , PreviousRowId


I need output like this below ,

Id Name Value1 value2 Total(Value1+Value2) PreviousRowId
1 A 10 0 10 0
2 B 10 5 15 1
3 C 15 6 21 2
4 D 21 7 28 3
5 E 28 8 36 4
6 F 36 5 41 5


Thanks,
Chandrahasan S
Calibear
Calibear
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Please visit the following link to see how to best provide data for your questions:

http://www.sqlservercentral.com/articles/Best+Practices/61537/

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Kingston Dhasian
Kingston Dhasian
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You will need a CTE to achieve the results

DECLARE   @table TABLE
(
   Id   INT,
   Name   VARCHAR(10),
   Value1   INT,
   value2   INT,
   PreviousRowId INT
)

INSERT   @table
SELECT   1, 'A', 10, 0, 0 UNION ALL
SELECT   2, 'B', 0, 5, 1 UNION ALL
SELECT   3, 'C', 0, 6, 2 UNION ALL
SELECT   4, 'D', 0, 7, 3 UNION ALL
SELECT   5, 'E', 0, 8, 4 UNION ALL
SELECT   6, 'F', 0, 5, 5

; WITH cte_table AS
(
   SELECT   t.Id, t.Name, t.Value1, t.value2, t.Value1 + t.value2 AS total, t.PreviousRowId
   FROM   @table AS t
   WHERE   t.PreviousRowId = 0
   UNION ALL
   SELECT   t2.Id, t2.Name, ct.total, t2.value2, ct.total + t2.value2 AS total, t2.PreviousRowId
   FROM   @table AS t2
   INNER JOIN cte_table AS ct ON t2.PreviousRowId = ct.Id
)

SELECT   *
FROM   cte_table




Kingston Dhasian

How to post data/code on a forum to get the best help - Jeff Moden
http://www.sqlservercentral.com/articles/Best+Practices/61537/
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