按月对多个订单查询购买数量最多的产品名称和总数,SQL怎么写
时间: 2024-02-24 19:58:50 浏览: 28
可以使用以下 SQL 语句按月查询多个订单中购买数量最多的产品名称和总数:
```
SELECT
YEAR(order_date) AS order_year,
MONTH(order_date) AS order_month,
product_name,
SUM(quantity) AS total_quantity
FROM orders
GROUP BY order_year, order_month, product_name
HAVING total_quantity = (
SELECT MAX(total_quantity)
FROM (
SELECT
YEAR(order_date) AS year,
MONTH(order_date) AS month,
SUM(quantity) AS total_quantity
FROM orders
GROUP BY year, month, product_name
) AS monthly_totals
WHERE monthly_totals.year = YEAR(orders.order_date)
AND monthly_totals.month = MONTH(orders.order_date)
)
ORDER BY order_year, order_month;
```
该 SQL 语句会将所有订单按照年份、月份和产品名称分组,统计每个月每个产品的购买数量,并返回购买数量最多的产品的信息。具体来说,对于每个月份,它会在所有产品的购买数量中找到最大值,然后返回所有购买数量等于最大值的记录,这些记录就是每个月购买数量最多的产品。结果会按照年份和月份升序排序。