Choose Your Level
Pick the difficulty that matches where you are. You can come back and try a harder level later.
Beginner
Draw an ERD
Create an entity-relationship diagram for a booking system.
1 to 2 hours 3 criteria
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Intermediate
Normalise a Flat Dataset
Take a denormalised spreadsheet and normalise it to 3NF.
2 to 3 hours 3 criteria
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Advanced
Data Dictionary for a System Migration
Build a data dictionary for migrating a legacy HR system.
3 to 5 hours 3 criteria
Start this level