如何将0添加到一个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;

我得到的结果为 250，但我想将结果显示为 250.0000。我查看了 RIGHT 和 LEFT 的 SQL 函数，但还没弄明白。 averageSales 的数据类型是 int。

我也试过下面的方法

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

Arithmetic overflow error converting int to data type numeric.

Answer 1

使用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;

Answer 2

使用 CAST 和 DECIMAL 而不是 NVARCHAR

GROUP BY CAST(SalesPerson as DECIMAL(8,4))

如何将0添加到一个int

How to add 0's to an int

sql

tsql

sql-server

number-formatting