Question

I have this table “insurance” in SQL Server 2008

insuranceId    StartDate         EndDate         CarID
   1           1-jan-2010        1-Jan-2011       1
   2           2-Jan-2011        2-Jan-2012       1
   3           1-Jan-2012        1-Jan-2012       2

I need to write Query Return :

cars were insurance by two consecutive

This database For Insurance Company I need to get the Car that have two consecutive Insurance

in the other word get the car which Enddate in the record = (startdate + 1) in The other record for the car

for this table i need to get the carId = 1 because

EndDate in Firstrecord = 1-Jan-2011 and the StartDate in second record = 2-Jan-2011

Answer 1

As I understand it, this gives what you want:

SELECT io.CarID
FROM insurance AS io
WHERE DATEADD(DAY, 1, io.EndDate) IN
    (SELECT ii.StartDate
     FROM insurance AS ii
     WHERE ii.CarID = io.CarID);