Help Center/ Data Warehouse Service / SQL Syntax Reference (9.1.0.x)/ DDL Syntax/ ALTER SYSTEM KILL SESSION
Updated on 2025-09-18 GMT+08:00
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ALTER SYSTEM KILL SESSION

Function

ALTER SYSTEM KILL SESSION ends a session.

Precautions

None

Syntax

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ALTER SYSTEM KILL SESSION 'session_sid, serial' [ IMMEDIATE ];

Parameter Description

Table 1 ALTER SYSTEM KILL SESSION parameters

Parameter

Description

Value Range

session_sid, serial

Specifies the SID and SERIAL of a session.

The SIDs and SERIALs of all sessions that can be queried from the system catalog V$SESSION.

IMMEDIATE

Indicates that a session will be ended instantly after the command is executed.

-

Examples

Query session information.

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SELECT sid,serial#,username FROM V$SESSION;

       sid       | serial# | username 
-----------------+---------+----------
 140131075880720 |       0 | 
 140131025549072 |       0 | 
 140131073779472 |       0 | 
 140131071678224 |       0 | 
 140131125774096 |       0 | 
 140131127875344 |       0 | 
 140131113629456 |       0 | 
 140131094742800 |       0 | 
(8 rows)

End the session whose SID is 140131075880720.

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ALTER SYSTEM KILL SESSION '140131075880720,0' IMMEDIATE;
Parent Topic: DDL Syntax