Data models and grain
Use data models and grain to make decisions inspectable.
What you should be able to do
Independently: Define keys, fields and relations for orders and order lines.
Suggested prerequisites
A short guide
Use data models and grain to make decisions inspectable. Define keys, fields and relations for orders and order lines. Read the indicated source section, identify its key concepts and conditions, and work through the example. Record inputs, sources, units and assumptions. Keep your method separate from the result, mark unanswered questions, and review the output against the checklist.
An example
One row per order differs from one row per item.
Your task
Define keys, fields and relations for orders and order lines.
Start with this source
Read the indicated section relevant to data models and grain and complete the foundation task.
This source is awaiting renewed review. Try the task above and adjacent skills; reviewed sources will appear here.
Your learning checklist
Required items: 0 / 10 completed or already known
Next: Read a role through its responsibilities
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