What Is Star Schema in Data Warehouse
A Star Schema Is a Database Organizational Structure Optimized for Use in a Data Warehouse or Business Intelligence That Uses a Single Large Fact Table to...
A star schema is a database organizational structure optimized for use in a data warehouse or business intelligence that uses a single large fact table to store transactional or measured data, and one or more smaller dimensional tables that store attributes about the data.
Why do we use star schema?
In computing, the star schema is the simplest style of data mart schema and is the approach most widely used to develop data warehouses and dimensional data marts. … The star schema is an important special case of the snowflake schema, and is more effective for handling simpler queries.
What are the characteristics of star schema?
- Simple structure -> easy to understand schema.
- Great query effectives -> small number of tables to join.
- Relatively long time of loading data into dimension tables -> de-normalization, redundancy data caused that size of the table could be large.
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