thomas_lhb

ORA-01843:
not a valid month
Cause:
A date specified an valid month.
Valid month are: January-December, for format code MONTH, and Jan-Dec, for format code MON.
Action:
Enter a valid month value in the correct format.

检查下源端和目标端的这两个参数是否一样呢：
NLS_DATE_LANGUAGE 和 NLS_DATE_FORMAT

SQL> show parameters NLS_DATE_LANGUAGE
NAME                           TYPE        VALUE
--------------------------- ----------- -----------------------------
nls_date_language             string      

SQL> show parameters NLS_DATE_FORMAT
NAME                           TYPE        VALUE
--------------------------- ----------- -----------------------------
nls_date_format               string