Multiple source databases

Hello
I need to load data into the dimensions and the cube from multiple source databases. We have databases separate transaction for each country, but the data should be loaded in common target schema. For the moment, we have created maps that loads data from a source database.

What is the best way to fill, for example clients clients tables (located in multiple source databases) transaction dimension if the distinctive signs of company may overlap?

I would break into two pieces: the burden of source in the area of transit systems, then the charge of staging in the table target, you are talking about is a dimension.

There is no reason you would have to use views or synonyms if you do not want. You could raise the issue with a GAME operator, in this case, a union, which brought together all sources in the staging table. However, I would create probably several mappings for each source system. I would create a mapping for each table you want to extract data from and then create a separate process flow that controls all of the tables being drawn from a particular source database. This allows you to program the extractions from the source systems independently of each other in the cases where they need to run at different times. The end result of all this will be a series of staging tables that are loaded from the tables of the source of all different locations. For each of the mappings of the singular, I create a constant that defines the data for this mapping source and load a constant in a column called SOURCE_SYSTEM, or perhaps, as you mentioned. Then, this column SOURCE_SYSTEM/COUNTRY + SOURCE_SYSTEM_ID would be the natural touch.

You can choose to keep these tables (as an ODS of sorts) or not... it's to you and your needs.

Finally, I would create a simple mapping that loads the table of the final objective of the intermediate table unique.

Let me know if this is not sensible.

Kind regards

Stewart Bryson

Tags: Business Intelligence

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