SQL: Liste mit Zeiträumen

[Jumpy]

Nur mal laut gedacht:

SQL-Code:

Select Basis.*,
  ( Select Min(B2.Datum) From Buchungen B2 Where B2.PersonID=Basis.PersonID 
    AND B2.Datum>=Basis.Datum AND B2.Datum+1 not in
   (Select Datum From Buchungen Where PersonID=B2.PersonID)
  ) as Endedatum
From
(
Select
  B.PersonID, P.Name, B.Datum as Startdatum
From
  Buchungen B
Left Join
  Personen P
On P.ID=B.PersonID
Where B.Datum-1 not in (Select Datum From Buchungen Where PersonID=B.PersonID
) Basis

Order By 1,2