Current Slide

Typical OLAP Operations

• Roll up (drill-up): summarize data
• by climbing up hierarchy or by dimension reduction
• Drill down (roll down): reverse of roll-up
• from higher level summary to lower level summary or detailed data, or introducing new dimensions
• Slice and dice: project and select
• Pivot (rotate):
• reorient the cube, visualization, 3D to series of 2D planes
• Other operations
• drill across: involving (across) more than one fact table
• drill through: through the bottom level of the cube to its back-end relational tables (using SQL)