Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


how to add Aggregated Transform as a new column


how to add Aggregated Transform as a new column

Author
Message
jaakkojuntunen
jaakkojuntunen
Forum Newbie
Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)

Group: General Forum Members
Points: 6 Visits: 38
Hi,

I have a flat file with 2 colums: TradeID and Nominal. Now I would like to add third column showing the summed nominal (=position) per tradeID. Please see an example attached. What would be the best way to do this?

br,
Jack
Attachments
Capture.PNG (8 views, 4.00 KB)
Lowell
Lowell
SSChampion
SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)

Group: General Forum Members
Points: 14955 Visits: 38948
the best way is to create a view, which would calculate that information on demand.
Best practice is to never add a column containing agregates in a table row, since it woudl require an update every time data changes.

you could achieve the same thing in line with a user defined function and a calculated column that uses that function, but the view is my recommendation.


;WITH MyCTE([TradeID],[nominal])
AS
(
SELECT 'TRADE1',500 UNION ALL
SELECT 'TRADE1',1000 UNION ALL
SELECT 'TRADE2',2000 UNION ALL
SELECT 'TRADE2',2000
)
SELECT
MyCTE.[TradeID],
MyCTE.[nominal],
Sumz.[position]
FROM MyCTE
INNER JOIN(SELECT [TradeID],SUM([nominal]) As position FROM MyCTE GROUP BY [TradeID]) Sumz
ON MyCTE.[TradeID]=Sumz.[TradeID]



Lowell

--
help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!

jaakkojuntunen
jaakkojuntunen
Forum Newbie
Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)Forum Newbie (6 reputation)

Group: General Forum Members
Points: 6 Visits: 38
Thanks a lot Lowell, I'll investigate that. So, you don't think it makes sense to do it in the SSIS package using eg. Aggregate Transformation?
br,
Jack
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search