Sorting changes presentation order but should not change the records being analyzed. Define primary and tie-breaking keys and decide how missing values should appear.
Before you begin
Use fictional or properly licensed data with a documented question, units and column definitions.
Work through the idea
State the decision or learning question first. Keep raw inputs separate from derived tables and document filters, exclusions and calculations. Check at least one result manually and record a limitation. Communicate what the evidence supports without inventing business outcomes or exposing personal information.
- Choose sort columns and directions
- Specify tie handling
- Check numeric versus text order
Practice task
Sort fictional orders by date and then by order ID, including two equal dates.
Check your result
Verify that every input row remains and that tied dates have a repeatable order.
A mistake to avoid
Do not assume that text values containing digits sort like numbers.
Keep a review note
Save the inputs or scenario, your reasoning and the result you checked. Explain one assumption and one case that needs more work. Revise the exercise after feedback and distinguish what you demonstrated from what remains untested.
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