Question

You have been tasked with constructing a star schema for a simplified automobile insurance system, utilizing an existing operational database for data retrieval. The dimensions, dimension attributes, and dimension sizes relevant to this schema are outlined below:

Policy:

Attributes: Policy ID, Policy Start Date, Policy End Date, Policy Type.
Size: Approximately 1 million policies.
Insured Party:

Attributes: Insured Party ID, First Name (FName), Last Name (LName), Date of Birth (DOB), Salary, Position.
Size: Variable (Associated with policies).
Coverage Item:

Attributes: Coverage Item ID, Coverage Item Description.
Size: Variable (Approximately 10 covered items per policy).
Agent:

Attributes: Agent ID, Agent Name, Agent Rank, Agent Territory.
Size: Variable (One agent per policy and covered item).
Period:

Attributes: Date, Month, Quarter.
Size: Variable (Related to temporal aspects of policy transactions).
The objective of this star schema is to capture policy transactions, with examples of such transactions including:

Issuing a new policy.
Updating an existing policy.
Adding or modifying coverage items.
Policy renewal or expiration events.
Your task involves organizing these dimensions to effectively capture and analyze policy-related transactions within the insurance system.

Answer 1

A star schema is a widely used data warehouse schema for data analysis and reporting. In the automobile insurance system, the star schema can be designed with a fact table and dimension tables.

Step-by-step explanation:

A star schema is a type of data warehouse schema that is widely used in data analysis and reporting. In the case of the automobile insurance system, the star schema can be designed as follows:

1. Fact Table: Policy Transactions
2. Dimension Tables: Policy, Insured Party, Coverage Item, Agent, and Period

The fact table, which is the Policy Transactions table, will capture the details of the policy-related transactions such as issuing a new policy, updating an existing policy, adding or modifying coverage items, and policy renewal or expiration events. This table will contain foreign keys to link to the dimension tables.