ORA-01810:格式代码出现两次

Question

为什么下面的sql会产生ORA-01810错误？我研究了错误,我为每个日期插入使用不同的日期格式

INSERT INTO bag_grte_clm
(
    schd_dprt_ldt,
    arr_trpn_stn_cd,
    bkg_crtn_gdt,
    sbmt_bag_grte_clm_dt,
    bag_grte_clm_stt_cd,
    lst_updt_gts,
    bag_grte_clm_gts,
    dprt_trpn_stn_cd
)
VALUES (
    TO_DATE('2015/12/06', 'yyyy/mm/dd'),
    'YUL',
    TO_DATE('2015-11-15', 'yyyy-mm-dd'),
    TO_DATE('120615', 'MMDDYY'),
    'DENIAL',
    (current_timestamp),
    TO_TIMESTAMP('20151206 00:00:00', 'yyyymmdd hh:mm:ss'),
    'ATL'
) 

Answer 1

TO_TIMESTAMP('20151206 00:00:00','yyyymmdd hh:mm:ss')

这有两个方面是错误的:

1.格式代码不正确

您重复了MM两次格式掩码.MM是月份,MI是分钟.

SQL> SELECT  TO_TIMESTAMP('20151206 00:00:00', 'yyyymmdd hh:mm:ss') FROM dual;
SELECT  TO_TIMESTAMP('20151206 00:00:00', 'yyyymmdd hh:mm:ss') FROM dual
                                          *
ERROR at line 1:
ORA-01810: format code appears twice

2.时间部分不正确

00:00:00是错误的,因为它会抛出ORA-01849,因为小时不能为零,它必须在1到12之间.

SQL> SELECT  TO_TIMESTAMP('20151206 00:00:00', 'yyyymmdd hh:mi:ss') FROM dual;
SELECT  TO_TIMESTAMP('20151206 00:00:00', 'yyyymmdd hh:mi:ss') FROM dual
                     *
ERROR at line 1:
ORA-01849: hour must be between 1 and 12

正确的方法是使用24小时格式,或保留默认的时间部分12 AM.

例如,

24小时格式:

SQL> SELECT  TO_TIMESTAMP('20151206 00:00:00', 'yyyymmdd hh24:mi:ss') my_tmstamp FROM dual;

MY_TMSTAMP
---------------------------------------------------------------------------
06-DEC-15 12.00.00.000000000 AM

没有时间部分:

SQL> SELECT  TO_TIMESTAMP('20151206', 'yyyymmdd') my_tmstamp FROM dual;

MY_TMSTAMP
-----------------------------------------------------------------------
06-DEC-15 12.00.00.000000000 AM

Answer 2

您已经使用了mm两次格式代码TO_TIMESTAMP('20151206 00:00:00', 'yyyymmdd hh:mm:ss')

MM是月份
MI是分钟
你可能意味着使用YYYYMMDD HH:MI:SS.

有关更多信息,请参阅日期格式模型列表.