情況描述：數據庫重啓後，用plsql無法連接上提示連接數據庫ora-28547 oracle net 管理錯誤，百度發現，情況和我的情況有點不一樣，在此僅提供參考，
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME= AHTT)
(SID_NAME = ahtt)
(ORACLE_HOME = /oracle/product/11.2.0/db_1)
# (PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=/home/arcsde/sdeexe100/lib/libst_shapelib.so:/home/arcsde/sdeexe100/lib/libst_raster_ora.so")
(SID_DESC =
(ORACLE_HOME = /oracle/product/11.2.0/db_1)
(SID_NAME = ahtt)
)
)
)
把
(SID_NAME = PLSExtProc)
改成（SID_NAME = ahtt)
就可以登錄，