Update with a batch size

[sleezy]

begin transaction
update a
set a.IncomeBand = b.IncBand
from tbOlRpt6Mnth2_2003 a , tbDevDLOriginLoan b
where a.saidno = b.idno and a.incomeband is null ----and a.dateid = 12
and a.idnoerr in (1,11,12,13,14)
commit

Have this query that l'm trying to run. l would like to run it in batches grouped by the Rundate
Rundate is split into 5 (i.e rundate1,rundate2 etc)categories and each catergory has 3 million records. How do l do that and commit after each rundate1 and track how long it took?

[MAK]

--Do this for all the 5 rundates. you can track the time. or run these as job in 5 different steps. you can find the time take by seeing the job step history.

select getdate()
begin transaction
update a
set a.IncomeBand = b.IncBand
from tbOlRpt6Mnth2_2003 a , tbDevDLOriginLoan b
where a.saidno = b.idno and a.incomeband is null ----and a.dateid = 12
and a.idnoerr in (1,11,12,13,14)
commit
select getdate()