对oracle中date/timestamp的操作

设置oracle中date的会话格式为 ‘yyyy-mm-dd hh24:mi:ss‘

alter session set nls_date_format=‘yyyy-mm-dd hh24:mi:ss‘;

设置oracle中timestamp的会话格式为 ‘yyyy-mm-dd hh24.mi.ss.ff’

alter session set nls_timestamp_format=‘yyyy-mm-dd hh24.mi.ss.ff‘;

c#中向oracle中插入date 可以直接操作日期数据：

SELECT * FROM T_TABLE WHERE createDate Between ‘2015-09-15‘ AND ‘2015-09-25‘

c#中向oracle中操作timestamp 必须间接的转timestamp 进行操作：

SELECT * FROM T_TABLE WHERE createDate Between TO_TIMESTAMP(‘2015-09-15‘,‘yyyy-mm-dd hh24:mi:ss‘) AND TO_TIMESTAMP(‘2015-09-25‘,‘yyyy-mm-dd hh24:mi:ss‘)

/或者:

SELECT * FROM T_TABLE WHERE createDate Between TO_TIMESTAMP_TZ(‘2013-12-09‘,‘YYYY-MM-DD HH24:MI:SS.FF TZH:TZM‘) AND TO_TIMESTAMP_TZ(‘2015-12-09‘,‘YYYY-MM-DD HH24:MI:SS.FF TZH:TZM‘)