0
votes
0answers
27 views

Shared measures in fact tables

I'm working on a star-schema and trying to find a best practise for the database design. I have three (at this moment) dimension tables for several facts. Most of the facts look-a-like (meaning ...
0
votes
0answers
19 views

Should I use conventional or computed columns for trivial metrics in a fact table?

A fact table can often have measures which are basically trivial. For example Orders.NumOrders will probably be "1" for every real record (synthetic records representing "no order" may populate this ...
1
vote
0answers
83 views

What type of fact table / loading solution for a reservation system?

I am designing a Data Warehouse with SQL Server 2012 and SSIS. The source system handles hotel reservations. The reservations are split between two tables, header and header line item. The ...
6
votes
3answers
487 views

Header and line item data source mismatch

I'm working with a star schema for a data warehouse and I am running into a problem with header and line items from different data sources. CREATE TABLE DataSourceAHeader ( OrderId INT NOT NULL ...
1
vote
1answer
192 views

Conceptual Design of a data warehouse (declaring the grain)

I am trying to design a data warehouse using this example scrubbed data. I need to declare the "grain". I know its the lowest level of detail in the fact table, but I am having a hard time determining ...
1
vote
2answers
483 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 ...
2
votes
1answer
832 views

Does surrogate key assignment for a fact table require that the source data has natural keys?

Let's say I have a simple OLTP database with orders, products, and customers: And from it, I am building a data mart with an orders fact table, product dimension, customer dimension, and date ...
3
votes
3answers
1k views

How do you roll up header-level values on a fact table with line-item granularity?

From what I've read, the recommended granularity for a fact table based on an order header / line item structure is at the line item level. In the process, any additive values that apply only to the ...
1
vote
1answer
836 views

Design of fact table(s) and dimensions tables for data warehouse

Hi i'm newbie in Datawarehousing, how would you model this in a Data Warehouse: i wish design the Data Warehouse which give the answers of statistics relating to a baseball league For players in ...
1
vote
0answers
604 views

An advice to design a fact table with a scd as a dimension

I have a problem of conception and I would like to get your ideas on how I'll be able to do what I am aiming. My goal is to create a datawarehouse, with three dimensions and one fact table so far. ...