在64位机器上了64位的oracle客户端。
然后装上PL/SQL Developer，但是连接oracle老报这个错：Initialization error SQL*Net not properly installedOracleHomeKey: OracleHomeDir:看网上的说法是到工具-首选项-oracle连接去配置oracle主目录名和oci库的位置。（Tools-Preferences-Oracle-Connection去配置Oracle Home和OCI library）配置过后登陆时仍然报错：Could not load "……/bin/oci.dll"OCIDLL forced to……LoadLibrary（……oci.dll） returned 0解决办法是：在64位的机器上安装32位的Oracle客户端。这样的话便连接成功。依据：从安装角度考虑，32bit的平台(操作系统和硬件系统)只支持32bitORACLE的安装；64bit平台既支持32bitORACLE的安装也支持64位ORACLE的安装；根据PL/SQL Developer的官方论坛里面的帖子：quote:--------------------------------------------------------------------------------I am not too fond of installing both 32 and 64 bit oracle clients on same machine - does it work at all?--------------------------------------------------------------------------------Yes, this works fine. --这是管理员的回复PL/SQL Developer is written in Delphi. The first thing that needs to become available is a 64 bit version of the Delphi IDE.还有另外一个帖子也提到：Hi when install in Windows Server 2003 R2 X64.When I try to connect an account , I have the following message :Initialization errorCould not load"E:/oracle/product/10.2.0/bin/oci.dll"--以下是管理员的回复Is this a 64 bit Oracle Client DLL? If so, please note that you need to install a 32 bit Oracle Client to use a 32 bit application like PL/SQL Developer.呼，终于解决了，在客户的web机上无法用PL/SQL连到linux上的Oracle数据库