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misshimichka
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Dec 8, 2025
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misshimichka
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Привет! По ЛР4:
Ставлю 10/13, нужно поправить задания с ошибками.
| --а также общее количество заказов | ||
| select shipcountry,shipcity, count(distinct orderid) | ||
| from "Sales"."Orders" as o | ||
| group by rollup(shipcountry, shipcity) |
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4.a. 0
Не выводится количество заказов по городам.
| c.city, | ||
| o.shipcountry, | ||
| o.shipcity | ||
| order by sum(d.unitprice * d.qty*(1-d.discount)); |
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- 0
Неверно вычисляетсяshipad
Неверная конечная дата периода
| FROM public."OrderValues" as o | ||
| WHERE orderdate BETWEEN '2007-01-01'::date AND '2007-12-31'::date | ||
| GROUP BY TO_CHAR(orderdate, 'Month'), EXTRACT(MONTH FROM orderdate) | ||
| ORDER BY EXTRACT(MONTH FROM orderdate); |
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2.6. Не ошибка, а замечание: правильнее создать алиас для EXTRACT(MONTH FROM orderdate) и не вычислять каждый раз, а сортировать по алиасу.
| dense_rank() over( order by count(orderid) desc, p.productname asc) | ||
| from "Production"."Products" as p | ||
| join "Sales"."OrderDetails" as d on p.productid = d.productid | ||
| group by p.productname,p.unitprice; |
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2.3. Запрос не выводит товары, которые не входят ни в один заказ.
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