How to query Oracle locked tables
In Oracle, you can use the SELECT statement to query the locked table. This statement is used to simply query data information. The syntax is "select*from v$locked_object a,dba_objects b where b.object_id=a.object_id" .
The operating environment of this tutorial: Windows 10 system, Oracle 11g version, Dell G3 computer.
How to query the locked table in Oracle
1. Query the reason why the table is locked
select l.session_id sid,
s.serial#,
l.locked_mode,
l.oracle_username,
s.user#,
l.os_user_name,
s.machine,
s.terminal,
a.sql_text,
a.action
from v$sqlarea a, v$session s, v$locked_object l
where l.session_id = s.sid
and s.prev_sql_addr = a.address
order by sid, s.serial#;2. Query the locked table
select b.owner,b.object_name,a.session_id,a.locked_mode from v$locked_object a,dba_objects b where b.object_id = a.object_id
3 .Check which session is causing it
select b.username,b.sid,b.serial#,logon_time from v$locked_object a,v$session b where a.session_id = b.sid order by b.logon_time
4. Kill the corresponding process to unlock
alter system kill session'135,397'
--135 is sid and 397 is serial
#Note: This user must Have DBA authority, otherwise it will prompt that the tables and views cannot be found
Recommended tutorial: "Oracle Video Tutorial"
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