源库ZHS16BGK,汉字在存放的时候占用两个字节
目标库UTF8,汉字在数据库里存放的时候占用三个字节
由于字符集不同,导致现在数据库impdp的时候有些表的字段长度不够,出现ORA-12899: value too large for column的错误。
SHUTDOWN IMMEDIATE;
STARTUP MOUNT EXCLUSIVE;
ALTER SYSTEM ENABLE RESTRICTED SESSION;
ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
ALTER SYSTEM SET AQ_TM_PROCESSES=0;
ALTER DATABASE OPEN;
ALTER DATABASE NATIONAL CHARACTER SET AL16UTF16; 更改国际字符集
ALTER DATABASE CHARACTER SET ZHS16GBK; 更改本地字符集
ORA-12717: Cannot issue ALTER DATABASE NATIONAL CHARACTER SET when NCLOB, NCHAR
or NVARCHAR2
data exists
ALTER DATABASE NATIONAL CHARACTER SET INTERNAL_USE AL16UTF16;
ORA-12712: new character set must be a superset of old character set
ALTER DATABASE character set INTERNAL_USE ZHS16GBK;
ORA-12721: operation cannot execute when other sessions are active
SHUTDOWN IMMEDIATE;
STARTUP MOUNT EXCLUSIVE;
ORA-01109: database not open
ORA-12719: operation requires database is in RESTRICTED mode
ALTER SYSTEM ENABLE RESTRICTED SESSION;
http://www.cnblogs.com/woxing/p/3853693.html