Question

并提前感谢你。我远不是一个sql开发人员，但有一些经验，我觉得这应该是相当简单的。

我发现下面的查询返回了该月的剩余天数。它就像一个魅力。但是当我尝试将它附加到一个简单的select语句中从表中获取数据时，我无法将其作为列追加。任何帮助将非常感激。

Declare @DaysLeft as INT

;With MyCTE AS
(
    SELECT number + 1 as 'CurrentDay'
    FROM   master..spt_values
    WHERE  type='p'
    AND    number < datepart(dd, DateAdd(day,-1,DateAdd(Month,1,DateAdd(Month,
           DateDiff(Month, 0, GETDATE()),0))))
AND    datename(WEEKDAY,DateAdd(Month, DateDiff(Month, 0, GETDATE()),
                                     number) ) not in ('Saturday','Sunday')
)

Select @DaysLeft = (Select COUNT(*) As MyTotal from MyCTE
WHERE CurrentDay >= DATEPART(DD, GETDATE()))

Select @DaysLeft as 'Remaining'

我在尝试什么：

 Select column 1, column 2 , Remaining (code from above) from TableName

Answer 1

我认为这是获得本月剩余天数的简单方法：

with remainingDays as (
      select dateadd(day, 1, currdate) as dte
      from (select cast(getdate() as date) currdate) x
      where month(dateadd(day, 1, currdate)) = month(getdate())
      union all
      select dateadd(day, 1, dte) as dte
      from remainingDays
      where month(dateadd(day, 1, dte)) = month(getdate())
     )
select *
from remainingDays;

它使用递归CTE，但这种类型的操作不应该有那么多开销。

Here它在Rex Tester中。

Answer 2

谢谢你的工作。非常感激。这是我的最终查询：

Declare @DaysLeft as INT
;With MyCTE AS
(
    SELECT number + 1 as 'CurrentDay'
FROM   master..spt_values
WHERE  type='p'
AND    number < datepart(dd, DateAdd(day,-1,DateAdd(Month,1,DateAdd(Month,
                                      DateDiff(Month, 0, GETDATE()),0))))
AND    datename(WEEKDAY,DateAdd(Month, DateDiff(Month, 0, GETDATE()),
                                     number) ) not in     ('Saturday','Sunday')
)

Select @DaysLeft = (Select COUNT(*) As MyTotal from MyCTE
WHERE CurrentDay >= DATEPART(DD, GETDATE()))


SELECT column 1, column 2, @daysLeft 'remaining'
FROM    TableName

获取剩余天数并附加到select语句

2 个答案: