1. 下载绿色版PLSQL Developer
https://share.weiyun.com/a218681375a20d9be37f626fded2d626
2. 配置环境变量(主要是Oracle Home、TNS_Admin和PATH)
3. 修改Layout并保存(保存方法:点击 Windws————Save Layout)
4. 取消Allow Multiple connections的复选框(Tools————Preferences————Connection————Allow Multiple connections )
PLSQL Developer软件使用大全:
http://blog.itpub.net/26736162/viewspace-2134628/