oracle9i和oracle10g多版本共存,oracle9i不能连接问题总结
oracle9i用pl/slq developer报" ORA-12154: TNS:无法解析指定的连接标识符"错误解决方案总结: 机器上先后安装了oracle9i和oracle10g,安装好后,10g能用pl/sql developer正常连接,但9i总是连不上,总是提示:"ORA-12154: TNS:无法解析指定的连接标识符",网上说oracle目录下:c:\oracle\ora9i\network\admin下的listener.ora配置有问题 配置如下:LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = china-efe28f3fd)(PORT = 1521)) ) (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0)) ) ) ) SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = PLSExtProc) (ORACLE_HOME = C:\oracle\ora9i) (PROGRAM = extproc) ) ) 检查一遍,没发现什么问题, 后来又查了查资料,说可能是pl/sql