方法一:
用unix_timestamp函数,将字符型的时间,转成unix时间戳
select * from t1 where unix_timestamp(time1) > unix_timestamp('2011-03-03 17:39:05') and unix_timestamp(time1) < unix_timestamp('2011-03-03 17:39:52');
方法二:
time1 between '2011-03-03 17:39:05' and '2011-03-03 17:39:52';
方法三:
可以将datetime类型转换成date类型再进行比较
例如:convert(date,表名.datetime列名) >= convert(date,表名.datetime列名)