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.
Snowflakes come from clouds, which are really just big clusters of water vapor. This water vapor scatters and forms ice crystals or rain in the clouds, depending on the temperature. The temperature must be below zero degrees Celsius (32 degrees F) for the water to turn into ice crystals.