| Re: Batch Script connecting two databases in an Extract Tranform Load (ETL) Design Pattern [message #4784 is a reply to message #4783] |
Sat, 20 June 2015 04:15   |
AJM
Messages: 2370
Registered: April 2006
Location: Surrey, UK
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Senior Member |
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For dealing with many-to-many relationships you have a choice of three patterns - multi2, link1 or List2. If you look at the "List Task (Process)" screen in the MENU system you will see examples of all three for dealing with navigation buttons. They each have slightly different ways of showing and modifying the data, so you need to play with them to see which one fits your particular circumstances.
When it comes to a choice between a single MULTI3 or two LINK1s you have to bear in mind that a single task can only deal with a particular relationship in a particular order, so if you have Parent1, Parent2 and Child it can either work in the sequence Parent1 -> Child (with a JOIN to Parent2) or Parent2 -> Child (with a JOIN to Parent1).
The beauty of Radicore is that you can quickly try one transaction pattern, and if that doesn't quite work you can scrap it and try another.
Tony Marston
http://www.tonymarston.net
http://www.radicore.org
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