一、问题描述
做数据迁移时报错ORA-12154

[oracle@qianzhi ~]$ expdp zrd/zrd@qianz directory=DATA_PUMP_DIR dumpfile=20180314TJJbak.dmp logfile=20180314TJJbak.log schemas=TJJ

Export: Release 11.2.0.4.0 - Production on Wed Mar 14 10:28:55 2018

Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.

UDE-12154: operation generated ORACLE error 12154
ORA-12154: TNS:could not resolve the connect identifier specified
--字符串没错，tns文件也没问题
二、检查语句后发现是没写IP地址
三、解决方案
将数据泵导出语句写完整

    [oracle@qianzhi admin]$ expdp zrd/zrd@172.16.69.30/qianz directory=DATA_PUMP_DIR dumpfile=20180314TJJbak.dmp logfile=20180314TJJbak.log schemas=TJJ;

Export: Release 11.2.0.4.0 - Production on Wed Mar 14 10:32:39 2018

Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
FLASHBACK automatically enabled to preserve database integrity.
Starting "ZRD"."SYS_EXPORT_SCHEMA_01": zrd