[转]不用安装Oracle Client如何使用PLSQL Developer

1. 下载oracle的客户端程序包（30M）
只需要在Oracle下载一个叫Instant Client Package的软件就可以了，这个软件不需要安装，只要解压就可以用了，很方便，就算重装了系统还是可以用的。
下载地址：http://www.oracle.com/technology/software/tech/oci/instantclient/htdocs/winsoft.html
解压到一个目录中即可，例如c:\oracleclient2. 配置操作系统环境变量
NLS_LANG=SIMPLIFIED CHINESE_CHINA.ZHS16GBK
TNS_ADMIN=C:\oracleclient3. 配置连接Oracle的配置。tnsnames.ora文件到目录C:\oracleclient。可以从oracle服务器拷贝一个过来。
内容类似：# tnsnames.ora Network Configuration File: E:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.ORCLProduct =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = prmpatm1.asiapacific.hpqcorp.net)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)ORCL122 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 16.157.133.122)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)4. 安装PLSQL Developer5. 配置PLSQL Developer（第一次可以不用登录直接进到PLSQL Developer）
Tools --> Preferences--> Connections,
Oracle Home内容为 C:\oracleclient
OCI library内容为 C:\oracleclient\oci.dll重新启动PLSQLDeveloper
完毕