I have a field that\'s in datetime format when date would be better and more consistent with the rest of the database, so I want to convert. The time part is all 00:00:00 an
If you want this in a SELECT-Statement, just use the DATE Operator:
SELECT DATE(`yourfield`) FROM `yourtable`;
If you want to change the table structurally, just change the datatype to DATE (of course only do this if this doesn't affect applications depending on this field).
ALTER TABLE `yourtable` CHANGE `yourfield` `yourfield` DATE;
Both will eliminate the time part.