The star-schema tag has no wiki summary.
5
votes
2answers
149 views
Cardinality rule for bitmap indexes
The Oracle documentation includes the following advice:
A bitmap index should be built on each of the foreign key columns of
the fact table or tables
In that reference, there is even a bitmap ...
3
votes
1answer
66 views
Should I snowflake or duplicate it across my facts?
I'm building up a data warehouse to be used by SSAS to create cubes on, and I'm debating between two possible schemas.
In my warehouse, I've got two different fact tables that tracking daily changes ...
2
votes
2answers
95 views
Open source and commercial tools to build dynamic queries of fact tables in star schema
What user interfaces or tools (commercial and/or open source) can query a star schema model (Ralph Kimball dimensional model)? So for example, if we have X fact tables, and Y dimension tables, and Z ...
2
votes
1answer
106 views
IP Address lookup star schema design
I am working on a project in which we need to do IP Address lookups. So for this we have got the datasets and now the next steps is to populate this datasets in to the table. And then have some ...
1
vote
2answers
136 views
Data warehouse support tickets
I'm starting to design a data warehouse for a company. The first questions we're trying to resolve are regarding their support ticketing system. My initial schema is as follows
Now one of the ...
0
votes
0answers
29 views
How to handle “many columns” in OLAP RDBMS
I have a fact that has around 1K different numerical attributes (i.e. columns). I would like to store this in to a column-oriented DB and perform cube analysis on it.
I tried to design a star ...
