求一SQL语句
cosio 2006-08-28 09:32:01 /*
1 2006-08-20 18:00:01.000
2 2006-08-20 18:00:01.000
3 2006-08-20 18:00:01.000
4 2006-08-20 18:00:01.000
1 2006-08-20 18:01:01.000
2 2006-08-20 18:01:01.000
3 2006-08-20 18:01:01.000
4 2006-08-20 18:01:01.000
1 2006-08-20 13:00:01.000
result:
--同一个IID,相差一分钟删除!
1 2006-08-20 18:00:01.000
2 2006-08-20 18:00:01.000
3 2006-08-20 18:00:01.000
4 2006-08-20 18:00:01.000
1 2006-08-20 13:00:01.000
*/