I\'m trying:
SELECT * FROM dbo.March2010 A WHERE A.Date >= 2010-04-01;
A.Date looks like: 2010-03-04 00:00:00.000>
A.Date
2010-03-04 00:00:00.000>
Try enclosing your date into a character string.
select * from dbo.March2010 A where A.Date >= '2010-04-01';