最近装了Oracle 10g，当我用pl/sql去连接的时候，经常报listener does not currently know of service requested in connect descriptor错误

解决方法：

在listener.ora文件中添加以下内容: (SID_DESC = (GLOBAL_DBNAME = orcl) (ORACLE_HOME = D:\oracle\product\10.2.0\db_1)  (SID_NAME = orcl) ) 注意:orcl为数据库名,D:\oracle\product\10.2.0\db_1为$ORACLE_HOME的路径,修改后的listener.ora文件内容如下: # listener.ora Network Configuration File: e:\oracle\product\10.1.0\Db_1\network\admin\listener.ora # Generated by Oracle configuration tools. SID_LIST_LISTENER =   (SID_LIST =   (SID_DESC =   (SID_NAME = PLSExtProc)   (ORACLE_HOME = e:\oracle\product\10.1.0\Db_1)   (PROGRAM = extproc)   )   (SID_DESC =   (GLOBAL_DBNAME = orcl)   (ORACLE_HOME = D:\oracle\product\10.2.0\db_1)    (SID_NAME = orcl)   )   ) LISTENER =   (DESCRIPTION_LIST =   (DESCRIPTION =   (ADDRESS_LIST =   (ADDRESS = (PROTOCOL = TCP)(HOST = linewell-d29e66.mshome.net)(PORT = 1521))   )   (ADDRESS_LIST =   (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))   )   )   )