There are a few different types of data warehouse architecture:
A star schema
A snowflake schema
A monolithic database
The first two are the most common.
A star schema is a single dimensional structure, where the fact table is the star and the dimension tables are one-to-many.
A snowflake schema is a multi-dimensional structure, where the fact table is the snowflake and the dimension tables are one-to-one.
The third is a monolithic database.
A star schema is one of the most common.
A monolithic database is a single database that has one schema.