比较上次日期和当前日期并根据条件更新表格

Question

我想根据以下条件更新考勤表。

NonWorking类型为1 如果它的前一天或下一个出勤类型不存在，则我想，以纪念NonWorking类型LWP在DAOthers列。

Answer 1

我认为你可以使用LAG()和LEAD()在这里出席类型的前面和值继续偷看。然后，如果其中一个不存在，请适当标记NonWorking列。

WITH cte AS (
    SELECT *, 
      LAG(AttendanceType, 1, 'Present') OVER (ORDER BY ADate) AS lag_at, 
      LEAD(AttendanceType, 1, 'Present') OVER (ORDER BY ADate) AS lead_at 
    FROM yourTable 
) 

UPDATE cte 
SET NonWorking = 1 
WHERE lag_at = 'Absent' OR lead_at = 'Absent' 

Answer 2

我不确定您是否想要sql查询更新现有数据或进行输入时需要的解决方案。

使用以下查询来更新现有数据：

Update AttendanceTable set DaOthers = 
(select top 1 'LWP' from AttendanceTable at1 
    where AttendanceTable.EmployeeId = at1.EmployeeId 
    and DATEADD(day, -1,AttendanceTable.ADate) = at1.ADate 
    and at1.NonWorking = 1) 

表befor上述查询执行：

到：

表上面的查询执行后在插入记录的更新时间：

如果你想同时插入数据，那么你可能需要设置一个变量第一，然后使用该变量，同时插入更新。在第一个查询你需要使用A日期和EmployeeID.The非工作始终是1

DECLARE @DaOthers nvarchar(20) = (select top 1 'LWP' from AttendanceTable at 
where DATEADD(day, 1, at.ADate) ='2017-02-04' and at.NonWorking = 1 and  EmployeeId = 1) 

insert into AttendanceTable 
(NonWorking, ADate, AttendanceType, EmployeeId, DaOthers) 
values 
(0,'2017-02-04', 'Present', 1,@DaOthers) 

Answer 3

With CTE as 
(
SELECT *, 
DATEADD(DAY, 1, Lag(ADate, 1,ADate) 
     OVER (PARTITION BY DAttendanceId ORDER BY ADate ASC)) AS EndDate 
FROM tbl_DailyAttendance where EmployeeId = 1001 and AMonth = 2 and AYear = 2017 and AttendanceType = 'Absent' and NonWorking = 0 
) 
--select * from CTE 
select * from tbl_DailyAttendance tda inner join CTE c on tda.ADate = c.EndDate where tda.EmployeeID = 1001 and tda.NonWorking = 1 order by tda.ADate 

我这是怎么检查的条件

Answer 4

因为你hvn't提供的样本数据做的，所以请尝试理解我的查询并纠正是否有任何细微之处。

;WITH CTE as 
(
select * 
,isnull((select 1 from tbl_DailyAttendance tdb 
where ((tdb.adate=DATEADD(day,-1,tda.adate)) 
or (tdb.adate=DATEADD(day,1,tda.adate))) 
and attendancetype='Absent' 
),0) NewnonWorkingType 

from tbl_DailyAttendance tda 
) 

--Testing purpose 
--select * from cte 

update tda 
set nonworking=b.NewnonWorkingType 
,daOther=case when b.NewnonWorkingType=1 then 'LWP' 
else null end 
from tbl_DailyAttendance tda 
inner join cte b on tda.id=b.id