Introduction
A database schema is the blueprint or logical structure that defines how data is organized and stored within a database. It outlines the various components of the database, including tables, fields (columns), relationships between tables, views, indexes, and other database objects. Essentially, it's a formal description of the entire database's structure, specifying data types, constraints, and how different elements are interconnected.
types of schemas
there are several types of schemas .they include;
star schemas
A star schema is a data warehouse and data mart architecture with a central fact table linked to several surrounding dimension tables, resembling a star's shape.
snowflake schemas
A snowflake schema in data warehousing is a dimensional model that extends the star schema by normalizing dimension tables into multiple, more specialized tables, creating a hierarchical structure resembling a snowflake.
Conclusion
A database schema is the blueprint or logical structure that defines how data is organized and stored within a database.
Top comments (0)