Loading data into your star schema
Now that you have your star schema designed, what's next? You need to build a plan so that you can load data from the source systems and get them properly in place in your star schema. In this section, I will give you some pointers to get you going. This is not an exhaustive or complete loading strategy but should help you understand the basics you need to plan.
Staging your data
I recommend that you plan to stage your data in a database prior to loading it into your star schema. The process of lookups and standardization can add significant load on the system that you are loading from. By having a staging database or a staging schema, you can load data from various source systems with minimal transformation. Then, using the resources dedicated to the process, the data can be loaded from staging to the star schema without there being any negative impacts on the source. How often you stage data can be managed based on the needs of the source...