Average Line Quantity
Logistics wants the average item quantity per line for each order: divide total qty for the order by its number of lines and round to 2 decimal places. Return order_id and avg_qty, sorted by order_id.
Uzorak očekivanog izlaza
Ovako izgleda ispravan odgovor — broj redaka je njegov vlastiti, ne mora se podudarati s tablicama sheme.
| avg_qty | order_id |
|---|---|
| 3.5 | 10 |
| 1 | 11 |
| 1.5 | 12 |
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