ORA-01858：尝试插入timestamp（0）列时出错

Question

我有以下提到的格式的数据，当我尝试插入表时出现错误

ORA-01858: a non-numeric character was found where a numeric was expected

如何将记录成功插入表中？

create table mytab (dt timestamp(0));

Insert into mytab
   (dt)
 Values
   (TO_TIMESTAMP('16/JUL/13 2:53:08. PM','DD/MON/YY fmHH12fm:MI:SS.FF AM')); 

Answer 1

您需要指定零小数秒。 这是您的错误：

SQL> create table mytab (dt timestamp(0));

Table created.

SQL> Insert into mytab
   (dt)
 Values
   (TO_TIMESTAMP('16/JUL/13 2:53:08. PM','DD/MON/YY fmHH12fm:MI:SS.FF AM'));   2    3    4  
   (TO_TIMESTAMP('16/JUL/13 2:53:08. PM','DD/MON/YY fmHH12fm:MI:SS.FF AM'))
                 *
ERROR at line 4:
ORA-01858: a non-numeric character was found where a numeric was expected

SQL> 

让我们修复输入

SQL> ed
Wrote file afiedt.buf

  1  Insert into mytab
  2     (dt)
  3   Values
  4*    (TO_TIMESTAMP('16/JUL/13 2:53:08.00 PM','DD/MON/YY fmHH12fm:MI:SS.FF AM'))
SQL> r
  1  Insert into mytab
  2     (dt)
  3   Values
  4*    (TO_TIMESTAMP('16/JUL/13 2:53:08.00 PM','DD/MON/YY fmHH12fm:MI:SS.FF AM'))

1 row created.

SQL>

因此，即使您指定了精度为零的时间戳，您的输入仍然需要与掩码匹配。 这意味着您需要.00才能匹配.FF 。

另外，不要理会小数秒：

SQL> ed
Wrote file afiedt.buf

  1  insert into mytab
  2     (dt)
  3   Values
  4*    (TO_TIMESTAMP('16/JUL/13 2:53:08 PM','DD/MON/YY fmHH12fm:MI:SS AM'))
SQL> r
  1  insert into mytab
  2     (dt)
  3   Values
  4*    (TO_TIMESTAMP('16/JUL/13 2:53:08 PM','DD/MON/YY fmHH12fm:MI:SS AM'))

1 row created.

SQL> 

---

顺便提及，请注意，TIMESTAMP（0）将舍入任何小数秒，舍入为半秒。 这是否重要取决于您将如何填充列以及所需时间的准确性。

Answer 2

您需要第二部分：

Insert into mytab(dt)
 Values
    (TO_TIMESTAMP('16/JUL/13 2:53:08.00 PM','DD/MON/YY fmHH12fm:MI:SS.FF AM')); 

Answer 3

你有一个 ”。” 几分钟后

这有效

select TO_TIMESTAMP('16/JUL/13 2:53:08 PM','DD/MON/YY fmHH12fm:MI:SS.FF AM') 
from dual