|Analyze the scenario given below and draw a Star Schema.Virtual University of Pakistan is going to develop a DWH for its Accounts branch. The officials of accounts branch want the reports regarding ‘deposited fees amount ‘and ‘fine’ on the basis of following.
Student (Student-ID, Name)
Campus (Campus -ID, Name)
Degree Program (Degree Program-ID, Name, Duration, Credit Hours)
Time (Time-ID, Date, Week, Month, Quarter, Year)
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A dimensional modelling technique in which a detail fact table is linked to dimension tables.
The data in data warehouses and data marts is accessed by end-users. The information contained in the data warehouse/data mart must be easy for the end-user to use and access. Denormalized designs are easier for end-users to use than highly normalized designs, however these designs are more difficult to design and maintain.
The Star Schema diagram graphically models the end-user’s view (i.e., the denormalized view) of how the information is accessed.
Components of a Star Schema Diagram
The diagram has three main components:
· Fact Table and its contents: metric attributes and the foreign keys necessary to join to the dimension tables,
· Dimension Tables and their contents: reference attributes, hierarchical attributes, and metric attributes. The dimension tables are highly denormalized,
· the lines that link the Dimension Tables to the Fact Table.
Star Schema Model
This diagram is a model of a star schema diagram.
Star Schema Example
The following is an example of a star schema for sales items.
Student is the fact table.
The other tables are dimension tables.DOWNLOAD SOLUTION HERE