Oracle问题：使用plsql连不上Oracle数据库的解决办法
在Oracle的安装目录下\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN找listener.ora，加上下面这句话
(SID_DESC =
(GLOBAL_DBNAME= ORCL)
(ORACLE_HOME= D:\app\Administrator\product\11.2.0\dbhome_1)
(SID_NAME= ORCL)
)
在Oracle的安装目录下\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN找listener.ora，加上下面这句话
(SID_DESC =
(GLOBAL_DBNAME= ORCL)
(ORACLE_HOME= D:\app\Administrator\product\11.2.0\dbhome_1)
(SID_NAME= ORCL)
)