Create code.md

datahubber · Aug 9, 2023 · 73e6c17 · 73e6c17
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diff --git a/SQL/Aggregate/code.md b/SQL/Aggregate/code.md
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+SELECT 
+    u.product_id, 
+    ROUND(SUM(p.price * u.units) / SUM(u.units), 2) AS average_price
+FROM unitssold u
+JOIN prices p ON 1=1
+    AND p.product_id = u.product_id
+    AND u.purchase_date BETWEEN p.start_date AND p.end_date
+GROUP BY u.product_id;