[oracle@rhel5 ~]$ impdp parfile=/home/oracle/expbk/impdp.txt

Import: Release 11.2.0.1.0 - Production on Fri May 27 22:02:50 2016

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Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Master table "BANK"."PUMP_SCHEMA_USERBANK" successfully loaded/unloaded
Starting "BANK"."PUMP_SCHEMA_USERBANK":  bank/******** parfile=/home/oracle/expbk/impdp.txt
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/SEQUENCE/SEQUENCE
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
. . imported "BANK"."CARDINFO"                           8.078 KB       7 rows
. . imported "BANK"."DEPOSIT"                            5.890 KB      10 rows
ORA-02374: conversion error loading table "BANK"."TRADEINFO"
ORA-12899: value too large for column TRADETYPE (actual: 6, maximum: 4)


报错原因：因为原来的数据库是GBK的，每个汉字两个字节，但新数据库是UTF-8的，每个汉字是三个字节，导致超过长度了。

解决：更改新库字符集为ZHS16GBK

SQL> startup mount
ORACLE instance started.

Total System Global Area  782573568 bytes
Fixed Size            1339372 bytes
Variable Size          473956372 bytes
Database Buffers      301989888 bytes
Redo Buffers            5287936 bytes
Database mounted.
SQL> alter system enable restricted session;

System altered.

SQL> alter system set job_queue_processes=0;

System altered.

SQL> alter system set aq_tm_processes=0;

System altered.

SQL> alter database open;

Database altered.

SQL> alter database character set internal_use zhs16gbk;

Database altered.

SQL> shut immediate
Database closed.
Database dismounted.
ORACLE instance shut down.