您好我尝试运行此查询:
select
count(id) as Total_books_in_store,
sum(case when type in ('sports', 'music', 'history') then 1 else 0 end) AS Total_sold,
(Total_sold/Total_books_in_store) as Sales_rate
from store
group by total_in_store
当我运行此查询时,它给了我错误:
第5行:1表达式不在GROUP BY键
我有表ID和类型,但我试图计算比率但没有成功。
答案 0 :(得分:-1)
;WITH Calculation AS(
SELECT
count(id) as Total_books_in_store,
sum(case when type in ('sports', 'music', 'history') then 1 else 0 end) AS Total_sold
from @Store
group by total_in_store
)
SELECT
Total_books_in_store,
Total_sold,
(Total_sold/Total_books_in_store) as Sales_rate
FROM Calculation