原來配置：listener.ora檔案如下：

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = DESKTOP-L9P3QTT)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
)

修改如下

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=tcp)(HOST=DESKTOP-L9P3QTT)(PORT=1521)(RATE_LIMIT=yes))
(ADDRESS=(PROTOCOL=tcp)(HOST=DESKTOP-L9P3QTT)(PORT=1522)(RATE_LIMIT=yes))
(ADDRESS=(PROTOCOL=tcp)(HOST=DESKTOP-L9P3QTT)(PORT=1523)))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

)
)

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輸入sqlplus system/[email protected]:1521/orcl

sqlplus system/[email protected]:1522/orcl

sqlplus system/[email protected]:1523/orcl

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