navicat连接客户端报错

怎么感觉oracle和sql server是一个货色。装个服务得装半天，还是mysql好，一下子就好了！下面有一个在centos7上面安装oracle11g的详细步骤，感觉找不到比这个更详细的了吧！

centos7安装详细步：https://www.cnblogs.com/VoiceOfDreams/p/8308601.html

navicat连接oracle

安装数据库之后在使用客户端连接数据库的时候总是报如下错误：

ORA-12514: TNS:listener does not currently know of service requested in connect

然后百度+谷歌，解决办法说是修改listener.ora文件，在文件中添加如下内容：【下面文件中标红的表示添加的内容】

[oracle@oracle ~]$ cd /data/oracle/product/11.2.0/db_1/network/admin/
[oracle@oracle admin]$ cat listener.ora
# listener.ora Network Configuration File: /data/oracle/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.LISTENER =(DESCRIPTION_LIST =(DESCRIPTION =(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))(ADDRESS = (PROTOCOL = TCP)(HOST = 10.9.8.201)(PORT = 1521)))   (SID_DESC =(GLOBAL_DBNAME = orcl)(ORACLE_HOME = /data/oracle/product/11.2.0/db_1)(SID_NAME = orcl)))ADR_BASE_LISTENER = /data/oracle

添加完之后重新启动监听器，连接的时候报如下错误：

ERROR:
ORA-12504: TNS:listener was not given the SERVICE_NAME in CONNECT_DATA

又去百度+谷歌，大部分答案都是说tnsnames.ora中service_name写成了server_name等，可是tnsnames.ora这个文件是oracle服务器自己生成的啊。

这时候查看监听器状态会有如下提示：

[oracle@oracle ~]$ lsnrctl statusLSNRCTL for Linux: Version 11.2.0.1.0 - Production on 14-MAY-2019 21:35:17Copyright (c) 1991, 2009, Oracle.  All rights reserved.Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                14-MAY-2019 19:16:38
Uptime                    0 days 2 hr. 18 min. 39 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /data/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File         /data/oracle/diag/tnslsnr/oracle/listener/alert/log.xml
Listening Endpoints Summary...(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.9.8.201)(PORT=1521)))
The listener supports no services                                 #这里提示没有服务
The command completed successfully

最后的解决办法，重启监听器，重启服务器。

[oracle@oracle admin]$ sqlplus /nologSQL*Plus: Release 11.2.0.1.0 Production on Tue May 14 21:57:46 2019Copyright (c) 1982, 2009, Oracle.  All rights reserved.SQL> connect sys / as sysdba
Enter password:
Connected.
SQL> shutdown immediate                    #关闭oracle服务器
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup                               #启动oracle服务器
ORACLE instance started.Total System Global Area  759943168 bytes
Fixed Size            2217224 bytes
Variable Size          507513592 bytes
Database Buffers      247463936 bytes
Redo Buffers            2748416 bytes
Database mounted.
Database opened.
SQL>

查看监听器状态：

[oracle@oracle admin]$ lsnrctl statusLSNRCTL for Linux: Version 11.2.0.1.0 - Production on 14-MAY-2019 22:18:47Copyright (c) 1991, 2009, Oracle.  All rights reserved.Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                14-MAY-2019 19:16:38
Uptime                    0 days 3 hr. 2 min. 8 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /data/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File         /data/oracle/diag/tnslsnr/oracle/listener/alert/log.xml
Listening Endpoints Summary...(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.9.8.201)(PORT=1521)))
Services Summary...
Service "orcl" has 1 instance(s).Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully

使用客户端连接oracle数据库：

[oracle@oracle admin]$ sqlplus scott/tiger@10.9.8.201/orclSQL*Plus: Release 11.2.0.1.0 Production on Tue May 14 22:19:21 2019Copyright (c) 1982, 2009, Oracle.  All rights reserved.Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing optionsSQL>

客户端连接成功：

更改oracle监听端口

oracle安装之后监听的本地的127.0.0.1这个ip，但是在window系统连接很显然不行的，更改上面提到的哪两个文件中的localhost为服务器的ip即可，然后重启监听器。

[oracle@oracle admin]$ cat listener.ora
# listener.ora Network Configuration File: /data/oracle/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.LISTENER =(DESCRIPTION_LIST =(DESCRIPTION =(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))(ADDRESS = (PROTOCOL = TCP)(HOST = 10.9.8.201)(PORT = 1521)))(SID_DESC =(GLOBAL_DBNAME = orcl)(ORACLE_HOME = /data/oracle/product/11.2.0/db_1)(SID_NAME = orcl)))ADR_BASE_LISTENER = /data/oracle[oracle@oracle admin]$ cat tnsnames.ora
# tnsnames.ora Network Configuration File: /data/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.LISTENER_ORCL =(ADDRESS = (PROTOCOL = TCP)(HOST = 10.9.8.201)(PORT = 1521))ORCL =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = 10.9.8.201)(PORT = 1521))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = orcl)))

oracle的sys用户远程登录

SQL> show parameter passNAME                     TYPE            VALUE
------------------------------------ ---------------------- ------------------------------
remote_login_passwordfile         string            EXCLUSIVE
SQL> 

remote_login_passwordfile有3个取值，取值如下：

none：不允许sysdba用户组成员远程登录访问数据库
exclusive: 只允许口令文件用于本数据库，允许sysdba用户组成员远程登录访问数据库
shared：允许其他数据库使用该口令文件，允许sysdba用户组成员远程登录访问数据库。

这个值设置若是none，则需要通过以下语句设置为exclusive.

SQL> alter system set remote_login_passwordfile=exclusive scope=spfile;
System altered.

然后需要重新启动数据库。

以上完成之后，设置sys用户的密码：

SQL> alter user sys identified by 123456;User altered.

在navicat中填入对应的连接字段，点击测试，报如下错误：

这时候点击，高级选项，把角色选为sysdba,连接即可！

转载于:https://www.cnblogs.com/wxzhe/p/10861986.html