SQL DATEDIFF 如果数字为正则添加加号

Question

我正在使用 DATEDIFF( day, date1, date2)，效果很好。

有没有可能正数有加号，负数有负号

Answer 1

您可以将输出 CAST 或 CONVERT 为字符串，然后根据需要添加“+”号（如果为负数，则减号已经存在。

Case When DATEDIFF( day, date1, date2) > 0 Then '+' Else '' End + Cast (DATEDIFF( day, date1, date2) as VarChar(10))

这是一个例子

;With MyTable as
(
    Select GETDATE() as Date1, GetDate()+10 as Date2
)
Select 
    Case When DATEDIFF( day, date1, date2) > 0 Then '+' Else '' End + Cast (DATEDIFF( day, date1, date2) as VarChar(10))
    From MyTable


;With MyTable as
(
    Select GETDATE() as Date1, GetDate()-10 as Date2
)
Select 
    Case When DATEDIFF( day, date1, date2) > 0 Then '+' Else '' End + Cast (DATEDIFF( day, date1, date2) as VarChar(10))
    From MyTable

Answer 2

您可以使用

DECLARE @date1 as datetime 
DECLARE @date2 as datetime 
DECLARE @datediff as varchar(10) 
SET @date1 = GETDATE() - 10
SET @date2 = GETDATE() - 1
SET @datediff = DATEDIFF( day, @date1, @date2)

 SELECT Case 
    When @datediff > 0 Then '+'
      Else '-' 
 End + @datediff

Answer 3

您可以使用条件格式：

SELECT FORMAT(DATEDIFF( day, date1, date2),'+#;-#;0')
FROM MyTable

SQL DATEDIFF 如果数字为正则添加加号

SQL DATEDIFF add plus sign if number is positive

sql

tsql

sql-server

datediff