1. Instant Client Downloads for Microsoft Windows (32-bit)
我下载的是：
instantclient-basic-win32-11.2.0.1.0.zip
http://www.oracle.com/technetwork/topics/winsoft-085727.html
2. 设置PL/SQL的Perferences的Connection：
D:appzhouzh3instantclient_11_2
D:appzhouzh3instantclient_11_2oci.dll
3. 设置环境变量
TNS_ADMIN=D:appzhouzh3product11.2.0dbhome_1NETWORKADMIN
NLS_LANG=SIMPLIFIED CHINESE_CHINA.ZHS16GBK