安装Oralce之后，想连接一下，结果通过客户端PL/SQL，怎么也连不上，提示TNS:监听程序当前无法识别连接解决办法：1.查看本机的/$
安装oralce之后，想连接一下，，结果通过客户端pl/sql，怎么也连不上，提示tns:监听程序当前无法识别连接
解决办法：
1.查看本机的/$/oracle/oracle/network/admin/
vi tnsnames.ora 没改之前后面的端口是1523 ，我把它改成1521了
sales =
(description =
(address = (protocol = tcp)(host = localhost.localdomain)(port = 1521))
(connect_data =
(server = dedicated)
(service_name = sales)
)
)
listener_sales =
(address = (protocol = tcp)(host = localhost.localdomain)(port = 1521))
extproc_connection_data =
(description =
(address_list =
(address = (protocol = ipc)(key = extproc3))
)
(connect_data =
(sid = plsextproc)
(presentation = ro)
)
)
2.再查看listener.ora
默认没有修改的是这样：其中没有上文tnsnames.ora中sales
sid_list_listener =
(sid_list =
(sid_desc =
(sid_name = plsextproc)
(oracle_home = /mapbar/oracle/oracle)
(program = extproc)
)
)
listener =
(description_list =
(description =
(address = (protocol = ipc)(key = extproc3))
(address = (protocol = tcp)(host = localhost.localdomain)(port = 1523))
)
需要增加：红色部分是新增加的
sid_list_listener =
(sid_list =
(sid_desc =
(sid_name = plsextproc)
(oracle_home = /$/oracle/oracle)
(program = extproc)
)
(sid_desc =
(global_dbname = sales)
(oracle_home = /$/oracle/oracle)
(sid_name = sales)
)
)
listener =
(description_list =
(description =
(address = (protocol = ipc)(key = extproc3))
)
(description =
(address = (protocol = tcp)(host = localhost.localdomain)(port = 1521))
)
)
3.执行 lsnrctl stop
lsnrctl start
