对于年月日中"日"是个位的情况下,处理不一样,\'yyyymmdd\'格式没问题,而式\'yyyy-mm-dd\'格式则不行,请看:
SQL> alter session set nls_date_format = \'yyyy-mm-dd hh24:mi:ss\';
Session altered.
SQL> select to_date(\'20070711\',\'yyyy-mm-dd hh24:mi:ss\') from dual;
select to_date(\'20070711\',\'yyyy-mm-dd hh24:mi:ss\') from dual
*
ERROR at line 1:
ORA-01861: literal does not match format string
SQL> select to_date(\'20070711\',\'yyyy-mm-dd\') from dual;
select to_date(\'20070711\',\'yyyy-mm-dd\') from dual
*
ERROR at line 1:
ORA-01861: literal does not match format string
SQL> select to_date(\'20070711\',\'yyyymmdd\') from dual;
TO_DATE(\'20070711\',\'
-------------------
2007-07-11 00:00:00
SQL>
-----------------------------------以上sql从网上找到的,但是在这个数据库上怎么与上面的结果截然不同呢?
SQL> select to_date(\'20070711\',\'yyyy-mm-dd hh24:mi:ss\') from dual;
TO_DATE(\'20070711\',\'YYYY-MM-DD
------------------------------
2007-7-11
SQL> select to_date(\'20070711\',\'yyyy-mm-dd\') from dual;
TO_DATE(\'20070711\',\'YYYY-MM-DD
------------------------------
2007-7-11
SQL> select to_date(\'20070711\',\'yyyymmdd\') from dual;
TO_DATE(\'20070711\',\'YYYYMMDD\')
------------------------------
2007-7-11
SQL> select sysdate from dual;
SYSDATE
-----------
2007-7-12 1
SQL>
aix db9.2.0.6