Question

我有一个Product表，其中包含OrderStatusID列。

以下是一个示例查询：

SELECT * FROM dbo.Product where CustomerID = 10;

问题：找到Products的{{1}}不为空的百分比。

Answer 1

SELECT CAST(COUNT(OrderStatus) AS FLOAT)/COUNT(*)*100 Percentage
FROM dbo.Product
WHERE CustomerID = 10

Answer 2

最简单的方法就是这样

SELECT 100*Count(OrderStatusID)/(SELECT count(*) FROM dbo.Product) FROM dbo.Product;

希望有所帮助

Answer 3

declare @total numeric(10,2)
select @total =count(*) from orders

select customerID, cast(100*count(*)/@total as numeric(10,2)) as Percentage
from orders
where customerID=10
group by customerID

Answer 4

SELECT
    SUM(CASE WHEN CustomerID=10 THEN 1 ELSE 0 END) / COUNT(CustomerID)
    as Percentage
FROM dbo.Product

查询以获取客户下达的订单百分比

4 个答案: