Question

What I have is a query that updates a column called “active”. Right now my query is:

UPDATE MainTable
   SET active = b'0'
 WHERE lastprocessdate < '5/21/2011'

Unfortunately, this updates everything — which is impossible because everything has today’s date on it. lastprocessdate is a datetime column, that originally is processed using NOW().

Answer 1

Use this:

In MySQL dates are written yyyy-mm-dd.

update MainTable set active = b'0' where lastprocessdate < '2011-05-21';