How to update record based on value of next record in SQL Server 2008

Question

I like to update a column based on a value of the next record:

resid   startdate   enddate     weekday hours
-----------------------------------------------
2980         


        

Answer 1

One way to do it is with a subquery:

UPDATE t1
SET enddate = (SELECT TOP 1 DATEADD(DAY, -1, startdate) 
               FROM YourTable t2 
               WHERE t1.startdate < t2.startdate 
               ORDER BY t2.startdate)
FROM YourTable t1
WHERE t1.enddate is null

Answer 2

update TableName set enddate = dateadd(day,1,startdate)