Question

如何在Microsoft SQL Server 2005中执行以下操作？

DECLARE @PCT Decimal(4,1)
SET @PCT=3.1
SELECT 
WHEN @PCT = CAST(@PCT AS Int) THEN CAST(CAST(@PCT AS Int) AS Varchar)
ELSE CAST(@PCT AS Varchar) END AS newPct

如果百分比以整数结尾，我试图放弃.0。

Answer 1

如果添加CASE关键字

，您将使用的内容

DECLARE @PCT Decimal(4,1)
SET @PCT=3.1
SELECT
    CASE WHEN @PCT = CAST(@PCT AS Int) THEN CAST(CAST(@PCT AS Int) AS Varchar)
    ELSE CAST(@PCT AS Varchar) END AS newPct

Answer 2

首先尝试施放到浮子上。从float转换为varchar的规则与小数到varchar的规则不同。以下似乎对我有用：

select cast(cast(@PCT as float) as varchar) as 'newPct'

SQL Server中格式良好的数字

2 个答案: