FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A star schema is a type of relational database schema that is composed of a single, central fact table that is surrounded by dimension tables. The snowflake schema consists of one fact table that is connected to many dimension tables, which can be connected to other dimension tables through a many-to-one relationship.

Detailed explanation-2: -A fact table contains dimension key columns that relate to dimension tables, and numeric measure columns. The dimension key columns determine the dimensionality of a fact table, while the dimension key values determine the granularity of a fact table.

Detailed explanation-3: -The combination of facts and dimensions is sometimes called a star schema.

Detailed explanation-4: -A star schema can have any number of dimension tables. The branches at the end of the links connecting the tables indicate a many-to-one relationship between the fact table and each dimension table.

Detailed explanation-5: -A star schema is a multi-dimensional data model used to organize data in a database so that it is easy to understand and analyze. Star schemas can be applied to data warehouses, databases, data marts, and other tools. The star schema design is optimized for querying large data sets.