Oracle中数据类型Timestamp转换成Date，
把 02-1月 -18 12.00.00.000000 上午 转换成：2010-01-01 00:00:00
select * from Authority t order by t.a_createddate desc for update;
select to_char(cast (cast (a_start_date as timestamp) as date),'yyyy-mm-dd hh24:mi:ss') as a_start_date from Authority;
这样就可以解决了：Oracle中数据类型Timestamp转换成Date！