December 2014
Intermediate to advanced
362 pages
8h 12m
English
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The Update Strategy transformation
Update Strategy transformations are used to INSERT, UPDATE, DELETE, or REJECT records based on the defined condition in the mapping. An Update Strategy transformation is mostly used when you design mappings for slowly changing dimensions. When you implement SCD, you actually decide how you wish to maintain historical data with the current data. We have discussed SCDs in Chapter 3, Implementing SCD – Using Designer Screen Wizards. When you wish to maintain no history, complete history, or partial history, you can achieve this functionality by either using the property defined in the session task or using the Update Strategy transformation.
When you use the session task, you instruct Integration Service to treat ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.