plsql 连接oracle11g出现提示ORA-12514:错误解决方法

如果使用64位oracle 需要下载32位的instantclient_11_2 来配置oci.dll
工具:oracle 11g、instantclient_11_2、plsql

tnsnames.ora只需要修改SERVICE_NAME的=数据库实例

ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

ORCL=
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

设置plsql