Data Cubes

• Databases can be used to collect and manage large data sets.
• However, databases are often being used all the time, and accessing them for Data Mining can cause delays.
• Moreover, the database may not be optimally aligned for Data Mining.
• So, off line databases are often constructred.
• The data is cleaned up with errors and unnecessary fields removed.
• Multiple databases may be combined.
• They're aligned for efficient retrieval of certain fields.
• These off line databases are called data cubes.