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Two databases one view

Posted on 2013-12-05
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Last Modified: 2013-12-27
Ok, I have a history database and a live database.  I want to combine the two for a report.  So should I make a view of the live company or the history company?  

Right now I have a view created from the live company and when I run the report, it is not giving me the order dates from the live company, just the history company.  Do I have the view setup wrong or are my links setup wrong in database expert?

New to making views, so need some help.
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Question by:TomBalla
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Expert Comment

by:Simone B
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Can you post the code for your view?
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TomBalla earned 0 total points
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The view has 3 tables.


SELECT     dbo.InvMaster.StockCode, dbo.SorDetail.SalesOrder, dbo.SorMaster.SalesOrder AS Expr1, dbo.InvMaster.ConvFactOthUom, dbo.SorDetail.MStockCode,
                      dbo.SorDetail.MStockDes, dbo.SorDetail.MOrderQty, dbo.SorDetail.MOrderUom, dbo.SorDetail.MPrice, dbo.SorDetail.MDiscValue, dbo.SorDetail.MConvFactAlloc,
                      dbo.SorMaster.OrderStatus, dbo.SorMaster.OrderDate
FROM         dbo.InvMaster INNER JOIN
                      dbo.SorDetail ON dbo.InvMaster.StockCode = dbo.SorDetail.MStockCode INNER JOIN
                      dbo.SorMaster ON dbo.SorDetail.SalesOrder = dbo.SorMaster.SalesOrder
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by:Simone B
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Because you haven't specified a database anywhere in your query, all of your data will be coming from the database where the view resides. So if the data in your report is showing History only, then I would expect to find the view in the History database.

If the two databases are on the same SQL instance, it doesn't matter which one holds the view, but you do have to tell the view where to get the data. Also, it's good practice to use aliases for your tables.

I don't know your data, so I can't tell what you expect or which database you want to use for each table. But the example below shows how you can get the StockCode and a SalesOrder from Live, and another SalesOrder from History.

SELECT L_IM.StockCode, H_SD.SalesOrder, L_SM.SalesOrder AS Expr1
FROM Live.dbo.InvMaster L_IM
INNER JOIN History.dbo.SorDetail H_SD ON L_IM.StockCode = H_SD.MStockCode
INNER JOIN Live.dbo.SorMaster L_SM ON H_SD.SalesOrder = L_SM.SalesOrder

The above is obviously just an example, and assumes you can link the keys correctly between History and Live. I would need more information as to how you want to join the tables to get a more accurate query.
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Author Comment

by:TomBalla
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The code I wrote above is all Live company (company S).  This code is the view I made in sql management studio.  

In crystal reports I made a report based off the history company (company H) and just added the view from the live company (S) through an odbc connection and linked them together.  

Am I doing this correct?
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Expert Comment

by:Simone B
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Hmmm... I was looking at this from the SQL perspective. It's been a while since I've used Crystal, but I recall you should be able to see the query behind the report. Once you've run the report, you will need to "Show SQL Query." That will give you a good idea of where the data is coming from. I believe it's on the Database menu.
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Author Comment

by:TomBalla
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here is sql query from crystal reports.



 SELECT "SorDetail"."MStockCode", "SorDetail"."MOrderQty", "SorDetail"."MStockUnitMass", "SorDetail"."MPrice", "SorDetail"."MWarehouse", "SorDetail"."SalesOrder", "SorDetail"."MOrderUom", "SorDetail"."MConvFactAlloc", "SorMaster"."OrderDate", "InvMaster"."ConvFactOthUom", "SorMaster"."OrderStatus", "SorDetail"."MDiscValue", "SorMaster"."Customer"
 FROM   ("SysproCompanyH"."dbo"."SorDetail" "SorDetail" INNER JOIN "SysproCompanyH"."dbo"."SorMaster" "SorMaster" ON "SorDetail"."SalesOrder"="SorMaster"."SalesOrder") INNER JOIN "SysproCompanyH"."dbo"."InvMaster" "InvMaster" ON "SorDetail"."MStockCode"="InvMaster"."StockCode"
 WHERE  "SorMaster"."OrderStatus"='9' AND ("SorMaster"."OrderDate">={ts '2011-12-14 00:00:00'} AND "SorMaster"."OrderDate"<{ts '2011-12-21 00:00:01'}) AND ("SorDetail"."MWarehouse"='38' OR "SorDetail"."MWarehouse"='39' OR "SorDetail"."MWarehouse"='40' OR "SorDetail"."MWarehouse"='41' OR "SorDetail"."MWarehouse"='42' OR "SorDetail"."MWarehouse"='43' OR "SorDetail"."MWarehouse"='44' OR "SorDetail"."MWarehouse"='45' OR "SorDetail"."MWarehouse"='46' OR "SorDetail"."MWarehouse"='47' OR "SorDetail"."MWarehouse"='48' OR "SorDetail"."MWarehouse"='49')
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Expert Comment

by:vasto
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TomBalla , mixing tables / views from different databases will slow the report. Try to implement the code provided by Buttercup1. If you don't want to start your report from scratch you change the view you create and to use just the view in your report.
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Author Comment

by:TomBalla
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So nevermind the View, just change the sql query to have both databases?
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Expert Comment

by:vasto
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If you are using tables you will be not able to change the query directly. In order to implement the solution proposed by Buttercup1 you need to create a command and redevelop your report from scratch. As a workaround you can update just the view and use it directly in your report
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Expert Comment

by:mlmcc
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Another way to handle this in Crystal is to use the live database for the main report and include a subreport that shows the related data from the history table.

mlmcc
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Author Closing Comment

by:TomBalla
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need to add a union
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