ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务

1.检查Oracle数据库主服务和监听服务是否打开

2.检查listener.ora文件是否正确配置

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = PLSExtProc)

(ORACLE_HOME = G:\oracle\product\10.2.0\db_1)

(PROGRAM = extproc)

)

(SID_DESC =

(GLOBAL_DBNAME = ORCL)

(ORACLE_HOME = G:\oracle\product\10.2.0\db_1)

(SID_NAME = ORCL)

)

)

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = zyk)(PORT = 1521))

)

)

3.查看日记记录是否已满
打开我的电脑-管理-事件查看器--应用程序，右键-----正常登-“清除所有事件”，