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.
A Tiny Particle High in Earth's Atmosphere. A snowflake begins when a tiny dust or pollen particle comes into contact with water vapor high in Earth's atmosphere. The water vapor coats the tiny particle and freezes into a tiny crystal of ice. This tiny crystal will be the seed from which a snowflake will grow.