Sql server 现在应该涵盖重叠和重复时间的定义。为了证明这一点，我在SQL中加入了更多的记录。如何为MySQL 5.6或5.7重写它？ ID StaffID Date BeginTime EndTime 1 101 2014-01

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现在应该涵盖重叠和重复时间的定义。为了证明这一点，我在SQL中加入了更多的记录。如何为MySQL 5.6或5.7重写它？

ID    StaffID  Date        BeginTime EndTime
1     101      2014-01-01  08:00     09:00
2     101      2014-01-01  08:30     09:30
3     101      2014-01-01  18:00     20:30
4     101      2014-01-01  19:00     21:00

StaffID Date        BeginTime EndTime
101     2014-01-01  08:00     09:30
101     2014-01-01  18:00     21:00

;with flat as
(
 select StaffID, ServiceDate, BeginTime, EndTime, BeginTime as groupid 
 from services S1
 where not exists (select * from services S2 
 where S1.StaffID = S2.StaffID 
 and S1.ServiceDate = S2.ServiceDate 
 and S2.BeginTime <= S1.BeginTime and S2.EndTime <> S1.EndTime
 and S2.EndTime > S1.BeginTime)

  union all

  select StaffID, ServiceDate, BeginTime, EndTime, BeginTime as groupid 
  from services S1
 where exists (select * from services S2 
 where S1.StaffID = S2.StaffID 
 and S1.ServiceDate = S2.ServiceDate 
 and S2.BeginTime = S1.BeginTime and S2.EndTime > S1.EndTime)
   and not exists (select * from services S2 
 where S1.StaffID = S2.StaffID 
 and S1.ServiceDate = S2.ServiceDate 
 and S2.BeginTime < S1.BeginTime
 and S2.EndTime > S1.BeginTime)

 union all

 select S.StaffID, S.ServiceDate, S.BeginTime, S.EndTime, flat.groupid 
 from flat
 inner join services S 
 on flat.StaffID = S.StaffID
 and flat.ServiceDate = S.ServiceDate
 and flat.EndTime > S.BeginTime
 and flat.BeginTime < S.BeginTime and flat.EndTime < S.EndTime
)

select StaffID, ServiceDate, MIN(BeginTime) as begintime, MAX(EndTime) as endtime 
from flat
group by StaffID, ServiceDate, groupid
order by StaffID, ServiceDate, begintime, endtime

select  i = row_number() over (order by (select null)) 
into    #numbers
from    @services; -- where i put your data

select      s.StaffID, 
            s.Date,
            linesWKT = geometry::UnionAggregate(line).ToString() 

            -- If you have SQLSpatialTools installed then:
            -- linesWKT = dbo.GeometryUnionAggregate(line).ToString() 

into        #aggregateRangesToGeo
from        @services s
cross apply (select 
                beginTimeF = convert(float, convert(datetime,beginTime)),
                endTimeF = convert(float, convert(datetime,endTime))
            ) prepare
cross apply (select
                beginPt = geometry::Point(beginTimeF, 0, 0),
                endPt = geometry::Point(endTimeF, 0, 0)
            ) pointify
cross apply (select 
                line = beginPt.STUnion(endPt).STEnvelope()
            ) lineify
group by    s.StaffID,
            s.Date;

select      lns.linesWKT,
            beginTime = convert(time, convert(datetime, ap.beginTime)),
            endTime = convert(time, convert(datetime, ap.endTime))
into        #parsedLines
from        (select distinct linesWKT from #aggregateRangesToGeo) lns
cross apply (select 
                lines = geometry::STGeomFromText(linesWKT, 0)
            ) geo
join        #numbers n on n.i between 1 and geo.lines.STNumGeometries()
cross apply (select 
                line = geo.lines.STGeometryN(n.i).STEnvelope()
            ) ln
cross apply (select 
                beginTime = ln.line.STPointN(1).STX,
                endTime = ln.line.STPointN(3).STX
            ) ap;

select      ar.StaffID,
            ar.Date,
            pl.beginTime, 
            pl.endTime
from        #aggregateRangesToGeo ar
join        #parsedLines pl on ar.linesWKT = pl.linesWKT
order by    ar.StaffID, 
            ar.Date,
            pl.beginTime;