Computer Science / Unit 8 CS 0440 short lesson, about 20 seconds
The Virtual Data Mart
Captions available
The idea
A virtual data mart holds no physical data — one access point over underlying stores, data pulled only at query time — costing extra source load and all historical tracking.
In practice
A dashboard assembling live answers from other systems owns nothing and remembers nothing.
Where people slip
No history is a hard limit, not a setting.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
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