Question

这是我的程序：

create procedure sj_busdays_prevmonth @dtStartDate datetime, @dtEnddate datetime--, @busdays_month int output
as 
return
SELECT Cast(
   (DATEDIFF(dd, @dtStartDate, @dtEndDate) + 1)
  -(DATEDIFF(wk, @dtStartDate, @dtEndDate) * 2)
  -(CASE WHEN DATENAME(dw, @dtStartDate) = 'Sunday' THEN 1 ELSE 0 END)
  -(CASE WHEN DATENAME(dw, @dtEndDate) = 'Saturday' THEN 1 ELSE 0 END)as int)

以下是我的发言：

declare @nBusDays int
declare @dtStartDate datetime
declare @dtEndDate datetime

SET @dtStartDate = cast(CONVERT(VARCHAR(10),DATEADD(m,-1,DATEADD(mm, DATEDIFF(m,0,GETDATE()), 0)),111) as datetime)
SET @dtEndDate = cast(CONVERT(VARCHAR(10),DATEADD(d,-1,DATEADD(mm, DATEDIFF(m,0,GETDATE()),0)),111) as datetime)

exec @nBusDays = sj_busdays_prevmonth @dtStartDate,@dtEndDate 

print @nBusDays

这是我的结果：

它应该是23，这里发生了什么？

Answer 1

更改

return
SELECT Cast(...

要

RETURN Cast(...

因为您需要返回CAST。

的结果

（您也可以RETURN (SELECT ...)）

Answer 2

您需要更改存储过程代码 -

create procedure sj_busdays_prevmonth @dtStartDate datetime, @dtEnddate datetime--,@busdays_month int output
as 
SELECT Cast(
   (DATEDIFF(dd, @dtStartDate, @dtEndDate) + 1)
  -(DATEDIFF(wk, @dtStartDate, @dtEndDate) * 2)
  -(CASE WHEN DATENAME(dw, @dtStartDate) = 'Sunday' THEN 1 ELSE 0 END)
  -(CASE WHEN DATENAME(dw, @dtEndDate) = 'Saturday' THEN 1 ELSE 0 END)as int)

然后运行您的语句以获得所需的结果。或者您也可以像这样更改代码 -

create procedure sj_busdays_prevmonth @dtStartDate datetime, @dtEnddate datetime,@busdays_month int output
as 
SELECT @busdays_month = Cast(
   (DATEDIFF(dd, @dtStartDate, @dtEndDate) + 1)
  -(DATEDIFF(wk, @dtStartDate, @dtEndDate) * 2)
  -(CASE WHEN DATENAME(dw, @dtStartDate) = 'Sunday' THEN 1 ELSE 0 END)
  -(CASE WHEN DATENAME(dw, @dtEndDate) = 'Saturday' THEN 1 ELSE 0 END)as int)

然后调用你的陈述 -

declare @nBusDays int
declare @dtStartDate datetime
declare @dtEndDate datetime
SET @dtStartDate = cast(CONVERT(VARCHAR(10),DATEADD(m,-1,DATEADD(mm, DATEDIFF(m,0,GETDATE()), 0)),111) as datetime)
SET @dtEndDate = cast(CONVERT(VARCHAR(10),DATEADD(d,-1,DATEADD(mm, DATEDIFF(m,0,GETDATE()),0)),111) as datetime)
exec sj_busdays_prevmonth @dtStartDate,@dtEndDate,@nBusDays OUT
print @nBusDays

调用存储过程将值返回到变量

2 个答案: