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GROUP BY: One Row Per Group

Lessons in this chapter:

  1. 12.1 Why GROUP BY Is the SQL PivotTable
  2. 12.2 How to Group by One Column (Sales by City)
  3. 12.3 How to Group by Two Columns (City and Product)
  4. 12.4 How to Alias Aggregates Clearly for Reports
  5. 12.5 Common GROUP BY Mistakes (Missing Column in GROUP BY)
  6. 12.6 Practice: Tickets by Agent and Status

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