1.简单SQL

1. 确定数据库正常启动

   1.查看数据库状态

   SYS@orcl> select status from v$instance;

    

   STATUS

   ------------

   OPEN

   2.查看监听状态

2. [oracle@yzjora11g:/home/oracle]$ lsnrctl -s status
4. LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 20-JUL-2021 18:08:54
6. Copyright (c) 1991, 2013, Oracle. All rights reserved.
8. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=yzjora11g)(PORT=1521)))
9. STATUS of the LISTENER
10. ------------------------
11. Alias LISTENER
12. Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
13. Start Date 20-JUL-2021 17:25:06
14. Uptime 0 days 0 hr. 43 min. 48 sec
15. Trace Level off
16. Security ON: Local OS Authentication
17. SNMP OFF
18. Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
19. Listener Log File /u01/app/oracle/diag/tnslsnr/yzjora11g/listener/alert/log.xml
20. Listening Endpoints Summary...
21. (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=yzjora11g)(PORT=1521)))
22. (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
23. Services Summary...
24. Service "orcl" has 2 instance(s).
25. Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...
26. Instance "orcl", status READY, has 1 handler(s) for this service...
27. Service "orclXDB" has 1 instance(s).
28. Instance "orcl", status READY, has 1 handler(s) for this service...
29. The command completed successfully确定数据库实例名

    [oracle@yzjora11g:/home/oracle]$ ps -ef | grep ora_ | head -2 | cut -d ‘_‘ -f3 | uniq

    Orcl

    [oracle@yzjora11g:/home/oracle]$ sqlplus -s / as sysdba

    select instance_name from v$instance;

     

    INSTANCE_NAME

    ----------------

    orcl

    1. [oracle@yzjora11g:/home/oracle]$ lsnrctl -s status
    2.  
    3. LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 20-JUL-2021 18:08:54
    4.  
    5. Copyright (c) 1991, 2013, Oracle. All rights reserved.
    6.  
    7. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=yzjora11g)(PORT=1521)))
    8. STATUS of the LISTENER
    9. ------------------------
    10. Alias LISTENER
    11. Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
    12. Start Date 20-JUL-2021 17:25:06
    13. Uptime 0 days 0 hr. 43 min. 48 sec
    14. Trace Level off
    15. Security ON: Local OS Authentication
    16. SNMP OFF
    17. Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
    18. Listener Log File /u01/app/oracle/diag/tnslsnr/yzjora11g/listener/alert/log.xml
    19. Listening Endpoints Summary...
    20.   (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=yzjora11g)(PORT=1521)))
    21.   (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
    22. Services Summary...
    23. Service "orcl" has 2 instance(s).
    24.   Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...
    25.   Instance "orcl", status READY, has 1 handler(s) for this service...
    26. Service "orclXDB" has 1 instance(s).
    27.   Instance "orcl", status READY, has 1 handler(s) for this service...
    28. The command completed successfully

1.简单SQL

原文：https://www.cnblogs.com/yuanzijian/p/15034224.html