Parts of a Computer. Computers are tools that can help you communicate, research, and create. In this movie, youâll learn about the parts of your laptop or desktop computer. Youâll explore different computer hardware that helps you input information, such as the keyboard, mouse, or scanner.
The snowflake schema is similar to the star schema. However, in the snowflake schema, dimensions are normalized into multiple related tables, whereas the star schema's dimensions are denormalized with each dimension represented by a single table.
The normalization splits up the data into additional tables. Unlike Star schema, the dimensions table in a snowflake schema are normalized. For example, the item dimension table in star schema is normalized and split into two dimension tables, namely item and supplier table. Now the item dimension table contains the attributes item_key, item_name, type, brand, and supplier-key. The supplier key is linked to the supplier dimension table.