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How can I generate a view that will give a SUM of specific columns from multiple other views?

Posted on 2011-03-18
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Last Modified: 2012-05-11
Good morning, Experts-Exchange community.  

I currently have 8 SQL views that give some detailed calculations based on a Customer ID which in turn will be used to generate a scoring model.  Is there a way for me to create another view that will show all Customer ID's, all 8 results, and a SUM?

Here's the kicker.  One view holds a DISTINCT listing of every Customer ID in the database along side it's Customer Type with a score given to the type.  Other views do not show every Customer ID as they may not receive a score due to not meeting the criteria.

Examples:

View 1:
CustID  |  CustType  |  TypeScore
1234  |  O  |   5
5678  |  B   |   15
6543  |  O  |   5
3456  |  B  |   15

View 2:
CustID   |   CustState   |   StateScore
1234  |  OH  |   0
5678  |  CA   |  20
6543  |  MI    |   20
3456  |  OH  |   0

View 3:
CustID   |   CashCount   |   CountScore
1234   |    6    |    30
6543   |    2    |    15

(The view I would want to create w/ the three "Score" columns with any and all Distinct Customer ID's - from "View 3", the customer ID's that aren't there would get a default value of "0"...)
SUM View:
CustID   |   TypeScore  |   StateScore   |   CountScore   |    ScoreSUM
1234   |   5     |   0    |   20  |   25
5678   |   15   |   20  |   0    |   35
6543   |   5     |   20  |   15  |   40
3456   |   15   |   0    |   0    |   15

Is something like this possible???
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Question by:NCollinsBBP
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3 Comments
 

Author Comment

by:NCollinsBBP
ID: 35166381
Better yet.  Would it be more wise to combine all 8 views into one?  I can post the Queries used in each view if this helps.
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Accepted Solution

by:
JoeNuvo earned 500 total points
ID: 35166403
this will do

SELECT
	View1.* ,
	IsNull(View2.StateScore, 0) StateScore,
	IsNull(View3.CountScore, 0) CountScore,
	View1.TypeScore + IsNull(View2.StateScore, 0) + IsNull(View3.CountScore, 0) ScoreSUM
FROM
	View1
	LEFT OUTER JOIN View2 ON View1.CustID = View2.CustID
	LEFT OUTER JOIN View3 ON View1.CustID = View3.CustID

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if all View get data from same table.
create SUM view directly from code maybe better.
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Author Closing Comment

by:NCollinsBBP
ID: 35166548
Thank you JoeNuvo!
The code you provided worked wonders.  Combining all views into one is going to have to wait until I open up more programming time.  This will help me greatly in the meantime.  

-NCollinsBBP
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