查询某个时间段内的销售数据
SELECT *FROM salesWHERE sale_date BETWEEN '2021-01-01' AND '2021-12-31';查询某个价格范围内的产品信息SELECT *FROM productsWHERE price BETWEEN 10 AND 50;查询某个年龄段的客户信息SELECT *FROM customersWHERE age BETWEEN 18 AND 30;查询某个数量范围内的库存信息SELECT *FROM inventoryWHERE quantity BETWEEN 100 AND 500; 

