想要看这个？

listener.ora文件添加以下内容：（ORACLE_HOME、SID_NAME、HOST、PORT值根据具体情况修改）
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(ORACLE_HOME = /oracle/app/oracle/dbhome/19c)
(SID_NAME = std)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = DG)(PORT = 1521))
)
)