Databases
Database Analogies
Collected by Giovanna Guerrini — Lecture Notes
Data storage and indexing
Anything else
helps students understand that a careful modelling can save retrieval efforts through an example close to their everyday experience (specifically tailored to the less represented gender)
| Symbol | Concept |
|---|---|
| resources (data) | shoes |
| selective data access | finding a pair of shoes |
| metadata (data describing data) | photos of shoes |
| index | mechanism that speed up search avoiding to look inside all boxes |
motivations for learning data modelling, data structuring, indexing
"You can achieve a saving in query/retrieval time at the cost of spending a bit more time during storage, similar to when you have many identical shoeboxes and you attach a photo of the shoes inside on each one."
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A notional machine is a pedagogic device to assist the understanding of some aspect of programs or programming. To something along the lines of A notional machine is a pedagogical tool designed to support the understanding of programs, programming, and other aspects of computing such as databases.
