What is Star schema?
A star schema is a way of organizing data for analysis in which one central fact table holds measurable events, such as sales, and links to dimension tables that describe them, such as date, product and customer. It is a common layout for data warehouses and BI tools because queries stay simple and fast.
Why it matters for your business
Reports built on a star schema load faster, are easier for analysts to understand and give consistent totals, which matters most in tools like Power BI where the model drives performance.
A retailer stores each sale as a row in a fact table, then slices revenue by store, week and product category through dimension tables without writing complex joins.