star scheme implemetation ppt

1. STAR SCHEMA IMPLEMENTATION
By :Swati Jaipurkar

2. Data warehouse modelling
Data Modelling
Multidimensional data Model :

3. Star Schema
 Represents Multidimentional data.
 In the center “FACT Table”
 Dimention Tables around the Fact table.
Dimention
Table 3
FACT TABLE
Dimention
Table 2
Dimention
Table 1
Dimention
Table 4

4. Steps in
Designing Star Schema
1. Identify business process for analysis(Like
sales)
2. Identify measures or facts (sales in $)
3. Identify dimentions for fact (Product, customer,
Time, Region etc)
4. List the coulmns that describes dimention
5. Determine lowest level of summary in fact table
sales.

5. Dimention and Fact Tables:

6. Advantages
1. Simpler queries
2. Simplified business reporting logic
3. Query performance gains
4. Fast aggregations
5. Feeding cubes

7. Implementing star schema using
ERDPlus tool
Use following link to implement star schema :
https://erdplus.com/