Top Units Sold

SQL practice question · Medium · Subqueries & CTEs · Amazon

order_lines has one row per order line (product_id, quantity). Total the units sold per product and return the product or products tied for the highest total. Output columns: product_id, units_sold. Order by product_id ascending.

Table: order_lines

Schema of order_lines
Column	Type
product_id	INTEGER
quantity	INTEGER

Schema of order_lines

Column

Type

product_id

INTEGER

quantity

INTEGER

Sample rows of order_lines
product_id	quantity
10	5
10	3
20	10
30	4
30	6

Sample rows of order_lines

product_id

quantity

Expected output on the sample data
product_id	units_sold
20	10
30	10

Expected output on the sample data

product_id

units_sold

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