如何将0添加到int

Question

我有以下SQL查询

SELECT MAX(averageSales)
FROM (
    SELECT AVG(TotalSale) AS averageSales
    FROM [Practice].[dbo].[Sales]
    GROUP BY CAST(SalesPerson AS NVARCHAR(100))
) AS Query1;

我得到结果,250但我想显示结果为250.0000.我已经查看RIGHT并LEFT运行SQL,但还没有弄明白.averageSales的数据类型是int.

我也尝试了以下方法

SELECT 
    MAX(averageSales), 
    CAST(MAX(averageSales) AS decimal(4,4))
FROM (
    SELECT AVG(TotalSale) AS averageSales 
    FROM [Practice].[dbo].[Sales]
    GROUP BY CAST(SalesPerson AS NVARCHAR(100))
) AS Query1;

但这会导致

将int转换为数据类型numeric的算术溢出错误.

Answer 1

用途FORMAT(..., '#.0000'):

SELECT FORMAT(MAX(averageSales), '#.0000') FROM 
(
    SELECT AVG(TotalSale) AS averageSales FROM [Practice].[dbo].[Sales]
    GROUP BY CAST(SalesPerson AS NVARCHAR(100))
) AS Query1;