SQL篩選日期範圍查詢

Question

我的日程記錄列表

StaffSchedules

他們中有些人已經訂好。

BookedSchedules

也有一些假期

假期

我想只有服務人員小號chedules

Expected Schedules= StaffSchedule - BookedSchedule-Holidays

即，我只想要從StaffSchedule表

下一列2,6是我試過的查詢，但它表明沒有結果

with NonBookingSlots as 
(
select StartdateTime,EndDateTime from Holidays 
union all 
select StartdateTime,EndDateTime from BookedSchedules 
) 

SELECT 
    StaffId, StartdateTime, EndDateTime 
FROM StaffSchedule 
WHERE 
not exists (select 1 
       from NonBookingSlots h 
       where cast(StartdateTime as DATETIME) between 
       cast(h.startdatetime as DATETIME) 
       and cast(h.enddatetime as DATETIME) 
      ) 

SQL FIDDLE DEMO

Answer 1

select * 
    from dbo.StaffSchedule x 
where not exists (select 'y' 
      from dbo.BookedSchedules y 
     where y.staffid = x.staffid 
      and y.startdatetime = x.startdatetime 
      and y.enddatetime = x.enddatetime) 
    and not exists (select 'z' 
      from dbo.Holidays z 
     where cast(z.startdatetime as date) = 
       cast(x.startdatetime as date)) 

SQL小提琴在這裏：http://sqlfiddle.com/#!3/07698/19/0

編輯 - 對付，範圍超過一天的假期：

select * 
    from dbo.StaffSchedule x 
where not exists (select 'y' 
      from dbo.BookedSchedules y 
     where y.staffid = x.staffid 
      and y.startdatetime = x.startdatetime 
      and y.enddatetime = x.enddatetime) 
    and not exists (select 'z' 
      from dbo.Holidays z 
     where cast(z.startdatetime as date) <= 
       cast(x.startdatetime as date) 
      and cast(z.enddatetime as date) >= 
       cast(x.enddatetime as date)) 

Answer 2

對於我所做的假定所有的例子，在BookedSchedules的開始和結束時間會精確地匹配與StaffSchedules開始和結束倍。

隨着CTE，類似這樣的問題：

我不推薦使用此查詢，但它可能是有幫助的，因爲它是類似問題的查詢。它不太可讀。

with NonBookingSlots as 
(
    select null as StaffId,StartdateTime,EndDateTime from Holidays 
    union all 
    select StaffId,StartdateTime,EndDateTime from BookedSchedules 
) 

select 
    StaffId, StartdateTime, EndDateTime 
from 
    StaffSchedule 
where 
    not exists(
    select 
     1 
    from 
     NonBookingSlots 
    where 
     StaffSchedule.StaffId = isnull(NonBookingSlots.StaffId,StaffSchedule.StaffId) 
     and (
     (
      StaffSchedule.StartDateTime = NonBookingSlots.StartDateTime 
      and StaffSchedule.EndDateTime = NonBookingSlots.EndDateTime 
     ) or (
      StaffSchedule.StartDateTime < NonBookingSlots.EndDateTime 
      and StaffSchedule.EndDateTime > NonBookingSlots.StartDateTime 
     ) 
    ) 
) 

SQL小提琴：http://sqlfiddle.com/#!3/9cbf4/14

沒有CTE：

這個版本是在我看來，更具有可讀性。

select 
    StaffId, StartdateTime, EndDateTime 
from 
    StaffSchedule 
where 
    not exists(
    select 
     1 
    from 
     BookedSchedules 
    where 
     StaffSchedule.StaffId = BookedSchedules.StaffId 
     and StaffSchedule.StartDateTime = BookedSchedules.StartDateTime 
     and StaffSchedule.EndDateTime = BookedSchedules.EndDateTime 
) and not exists(
    select 
     1 
    from 
     Holidays 
    where 
     StaffSchedule.StartDateTime < Holidays.EndDateTime 
     and StaffSchedule.EndDateTime > Holidays.StartDateTime 
) 

SQL小提琴：http://sqlfiddle.com/#!3/9cbf4/15

隨着外鍵 - 我建議：

如果BookedSchedules總是匹配StaffSchedule你應該使用外鍵StaffSchedule，而不是複製的開始並在BookedSchedules結束時間。這會產生更清晰和更高效的查詢。

select 
    StaffId, StartdateTime, EndDateTime 
from 
    StaffSchedule 
where 
    not exists(
    select 
     1 
    from 
     BookedSchedules 
    where 
     StaffSchedule.Id = BookedSchedules.StaffScheduleId 
) and not exists(
    select 
     1 
    from 
     Holidays 
    where 
     StaffSchedule.StartDateTime <= Holidays.EndDateTime 
     and StaffSchedule.EndDateTime >= Holidays.StartDateTime 
) 

SQL小提琴：http://sqlfiddle.com/#!3/8a684/3