Question : SQLSERVER UPdate Time to 00:00:00

Hello,

I have a SQLSERVER Table with a field defined as mDAteTime.
mDateTime has the following samplle data:
10/15/2008 7:00:00 AM
10/18/2008 7:00:00 AM
10/20/2008 7:00:00 AM
10/21/2008 7:00:00 AM

I would like to update the 07:00:00 to 00:00:00. I have used the following commands unsuccesfully:

update LocationContributions SET mDateTime = DateAdd(hh,0,mDateTime)
update LocationContributions SET mDateTime = DateAdd(hh,-07,mDateTime)

Please help. Thanks

Steve Stacel

Answer : SQLSERVER UPdate Time to 00:00:00

update LocationContributions SET mDateTime = DATEDIFF(d, 0, mDateTime)