I was reading the ETL tutorial here. Just wanted to know how to build a datawarehouse?
Minimum how many tables should be in the database?
What are the tools required to do E T L operations?
Is there any code to be written?
One could write books on the answers to those questions.
Before doing anything, you need to decide what answers
you want from your data, and what hardware, software and
expertise you have at your disposal, or are willing to
purchase or build.
The answers also depend on the volume and shape of your
existing data, and what formats it is in.
These answers fall outside of the realm of "support" and
more into "consulting."