Aggregation with GROUP BY and HAVING

Help learners understand this topic clearly, practice it on a small example, and produce reviewable evidence before moving to the next module.

Units

1. Unit 04.00: Aggregation with GROUP BY and HAVING: Read the schema and identify the grain
2. Unit 04.01: Aggregation with GROUP BY and HAVING: Write the query in small testable steps
3. Unit 04.02: Aggregation with GROUP BY and HAVING: Check row counts, joins, filters, and nulls
4. Unit 04.03: Aggregation with GROUP BY and HAVING: Explain what the query proves and does not prove
5. Unit 04.04: Aggregation with GROUP BY and HAVING: Save the final SQL evidence note

Module work

• Activity
• Knowledge check
• Summary