不同的组织可能会有不同的休假。所以,在这种情况下,需要定制休息周。为此,我尝试了下面的Sql查询
DECLARE @dayName VARCHAR(9);
SET @dayName = DATEName(DW, GETDATE());
IF(@dayName = 'Friday' OR @dayName = 'Saturday')
PRINT 'Weekend';
ELSE
PRINT 'NOT Weekend';
从上面的查询我可以得到我特定的周末。
例如:
如果星期五或任何其他日子被提及为周末,那么从周五到周四对应一周,我需要找到一个月内有多少个完整周?还是一年?
我希望在定制的weekOff的基础上获得周数。
首先,你需要制作全年或整月的日历,所以我会使用cte递归来制作它。
SELECT DATEADD(month, DATEDIFF(month, 0, getdate()), 0) AS StartOfMonth,
DATEADD(mm,1,DATEADD(mm, DATEDIFF(m,0,GETDATE()),0)) - 1 AS EndOfMonth
UNION ALL
SELECT StartOfMonth +1 , EndOfMonth
FROM CTE
WHERE StartOfMonth < EndOfMonth
一周有7天,无论从任何一周开始,我们都会看到这是一个Gaps and Islands problem,因为周数将从1
to 7
重复。
所以我会使用CASE WHEN
与DateNameto make your customer week date number, which number starts on
Friday`或根据你的逻辑。
;WITH CTE AS (
SELECT DATEADD(month, DATEDIFF(month, 0, getdate()), 0) AS StartOfMonth,
DATEADD(mm,1,DATEADD(mm, DATEDIFF(m,0,GETDATE()),0)) - 1 AS EndOfMonth
UNION ALL
SELECT StartOfMonth +1 , EndOfMonth
FROM CTE
WHERE StartOfMonth < EndOfMonth
)
SELECT *,
CASE DateName(DW, StartOfMonth)
WHEN 'Friday' THEN 0
WHEN 'Saturday' THEN 1
WHEN 'Sunday' THEN 2
WHEN 'Monday' THEN 3
WHEN 'Tuesday' THEN 4
WHEN 'Wednesday' THEN 5
WHEN 'Thursday' THEN 6
WHEN 'Tuesday' THEN 7
END grp,
ROW_NUMBER() OVER(ORDER BY StartOfMonth) rn
FROM CTE
[结果]:
| StartOfMonth | EndOfMonth | grp | rn |
|----------------------|----------------------|-----|----|
| 2018-09-01T00:00:00Z | 2018-09-30T00:00:00Z | 1 | 1 |
| 2018-09-02T00:00:00Z | 2018-09-30T00:00:00Z | 2 | 2 |
| 2018-09-03T00:00:00Z | 2018-09-30T00:00:00Z | 3 | 3 |
| 2018-09-04T00:00:00Z | 2018-09-30T00:00:00Z | 4 | 4 |
| 2018-09-05T00:00:00Z | 2018-09-30T00:00:00Z | 5 | 5 |
| 2018-09-06T00:00:00Z | 2018-09-30T00:00:00Z | 6 | 6 |
| 2018-09-07T00:00:00Z | 2018-09-30T00:00:00Z | 0 | 7 |
| 2018-09-08T00:00:00Z | 2018-09-30T00:00:00Z | 1 | 8 |
| 2018-09-09T00:00:00Z | 2018-09-30T00:00:00Z | 2 | 9 |
| 2018-09-10T00:00:00Z | 2018-09-30T00:00:00Z | 3 | 10 |
| 2018-09-11T00:00:00Z | 2018-09-30T00:00:00Z | 4 | 11 |
| 2018-09-12T00:00:00Z | 2018-09-30T00:00:00Z | 5 | 12 |
| 2018-09-13T00:00:00Z | 2018-09-30T00:00:00Z | 6 | 13 |
| 2018-09-14T00:00:00Z | 2018-09-30T00:00:00Z | 0 | 14 |
| 2018-09-15T00:00:00Z | 2018-09-30T00:00:00Z | 1 | 15 |
| 2018-09-16T00:00:00Z | 2018-09-30T00:00:00Z | 2 | 16 |
| 2018-09-17T00:00:00Z | 2018-09-30T00:00:00Z | 3 | 17 |
| 2018-09-18T00:00:00Z | 2018-09-30T00:00:00Z | 4 | 18 |
| 2018-09-19T00:00:00Z | 2018-09-30T00:00:00Z | 5 | 19 |
| 2018-09-20T00:00:00Z | 2018-09-30T00:00:00Z | 6 | 20 |
| 2018-09-21T00:00:00Z | 2018-09-30T00:00:00Z | 0 | 21 |
| 2018-09-22T00:00:00Z | 2018-09-30T00:00:00Z | 1 | 22 |
| 2018-09-23T00:00:00Z | 2018-09-30T00:00:00Z | 2 | 23 |
| 2018-09-24T00:00:00Z | 2018-09-30T00:00:00Z | 3 | 24 |
| 2018-09-25T00:00:00Z | 2018-09-30T00:00:00Z | 4 | 25 |
| 2018-09-26T00:00:00Z | 2018-09-30T00:00:00Z | 5 | 26 |
| 2018-09-27T00:00:00Z | 2018-09-30T00:00:00Z | 6 | 27 |
| 2018-09-28T00:00:00Z | 2018-09-30T00:00:00Z | 0 | 28 |
| 2018-09-29T00:00:00Z | 2018-09-30T00:00:00Z | 1 | 29 |
| 2018-09-30T00:00:00Z | 2018-09-30T00:00:00Z | 2 | 30 |
然后我们可以尝试使用rn - grp
来获得连续的组。
[结果]:
| StartOfMonth | EndOfMonth | grp |
|----------------------|----------------------|-----|
| 2018-09-01T00:00:00Z | 2018-09-30T00:00:00Z | 0 |
| 2018-09-02T00:00:00Z | 2018-09-30T00:00:00Z | 0 |
| 2018-09-03T00:00:00Z | 2018-09-30T00:00:00Z | 0 |
| 2018-09-04T00:00:00Z | 2018-09-30T00:00:00Z | 0 |
| 2018-09-05T00:00:00Z | 2018-09-30T00:00:00Z | 0 |
| 2018-09-06T00:00:00Z | 2018-09-30T00:00:00Z | 0 |
| 2018-09-07T00:00:00Z | 2018-09-30T00:00:00Z | 7 |
| 2018-09-08T00:00:00Z | 2018-09-30T00:00:00Z | 7 |
| 2018-09-09T00:00:00Z | 2018-09-30T00:00:00Z | 7 |
| 2018-09-10T00:00:00Z | 2018-09-30T00:00:00Z | 7 |
| 2018-09-11T00:00:00Z | 2018-09-30T00:00:00Z | 7 |
| 2018-09-12T00:00:00Z | 2018-09-30T00:00:00Z | 7 |
| 2018-09-13T00:00:00Z | 2018-09-30T00:00:00Z | 7 |
| 2018-09-14T00:00:00Z | 2018-09-30T00:00:00Z | 14 |
| 2018-09-15T00:00:00Z | 2018-09-30T00:00:00Z | 14 |
| 2018-09-16T00:00:00Z | 2018-09-30T00:00:00Z | 14 |
| 2018-09-17T00:00:00Z | 2018-09-30T00:00:00Z | 14 |
| 2018-09-18T00:00:00Z | 2018-09-30T00:00:00Z | 14 |
| 2018-09-19T00:00:00Z | 2018-09-30T00:00:00Z | 14 |
| 2018-09-20T00:00:00Z | 2018-09-30T00:00:00Z | 14 |
| 2018-09-21T00:00:00Z | 2018-09-30T00:00:00Z | 21 |
| 2018-09-22T00:00:00Z | 2018-09-30T00:00:00Z | 21 |
| 2018-09-23T00:00:00Z | 2018-09-30T00:00:00Z | 21 |
| 2018-09-24T00:00:00Z | 2018-09-30T00:00:00Z | 21 |
| 2018-09-25T00:00:00Z | 2018-09-30T00:00:00Z | 21 |
| 2018-09-26T00:00:00Z | 2018-09-30T00:00:00Z | 21 |
| 2018-09-27T00:00:00Z | 2018-09-30T00:00:00Z | 21 |
| 2018-09-28T00:00:00Z | 2018-09-30T00:00:00Z | 28 |
| 2018-09-29T00:00:00Z | 2018-09-30T00:00:00Z | 28 |
| 2018-09-30T00:00:00Z | 2018-09-30T00:00:00Z | 28 |
最后,我们只是在月份或年份中获得所有count(*) = 7
组,这意味着完整的周数。
查询1:
整整一个月
;WITH CTE AS (
SELECT DATEADD(month, DATEDIFF(month, 0, getdate()), 0) AS StartOfMonth,
DATEADD(mm,1,DATEADD(mm, DATEDIFF(m,0,GETDATE()),0)) - 1 AS EndOfMonth
UNION ALL
SELECT StartOfMonth +1 , EndOfMonth
FROM CTE
WHERE StartOfMonth < EndOfMonth
)
SELECT COUNT(*) fullweekAmount from (
SELECT
MIN(StartOfMonth) startdt,
MAX(StartOfMonth) enddt
FROM (
SELECT *,
ROW_NUMBER() OVER(ORDER BY StartOfMonth) -
CASE DateName(DW, StartOfMonth)
WHEN 'Friday' THEN 0
WHEN 'Saturday' THEN 1
WHEN 'Sunday' THEN 2
WHEN 'Monday' THEN 3
WHEN 'Tuesday' THEN 4
WHEN 'Wednesday' THEN 5
WHEN 'Thursday' THEN 6
WHEN 'Tuesday' THEN 7
END grp
FROM CTE
) t1
GROUP BY grp
having count(*) = 7
) t1
| fullweekAmount |
|----------------|
| 3 |
一年
;WITH CTE AS (
SELECT DATEADD(yy, DATEDIFF(yy, 0, GETDATE()), 0) AS StartOfMonth,
DATEADD(yy, DATEDIFF(yy, 0, GETDATE()) + 1, -1) - 1 AS EndOfMonth
UNION ALL
SELECT StartOfMonth +1 , EndOfMonth
FROM CTE
WHERE StartOfMonth < EndOfMonth
)
SELECT COUNT(*) fullweekAmount from (
SELECT
MIN(StartOfMonth) startdt,
MAX(StartOfMonth) enddt
FROM (
SELECT *,
ROW_NUMBER() OVER(ORDER BY StartOfMonth) -
CASE DateName(DW, StartOfMonth)
WHEN 'Friday' THEN 0
WHEN 'Saturday' THEN 1
WHEN 'Sunday' THEN 2
WHEN 'Monday' THEN 3
WHEN 'Tuesday' THEN 4
WHEN 'Wednesday' THEN 5
WHEN 'Thursday' THEN 6
WHEN 'Tuesday' THEN 7
END grp
FROM CTE
) t1
GROUP BY grp
having count(*) = 7
) t1
option (maxrecursion 0)
注意
如果您的cte递归日期超过100,您将收到错误
声明终止。在语句完成之前,最大递归100已用尽。
你可以设置
option (maxrecursion 0)
qazxsw poi number qazxsw poi和qazxsw poi意味着你的休息日
替代解决方案,
Case When