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SQL> SELECT /*+ rule */ se.username,se.sid,se.serial#,se.sql_address,se.machine,se.program,
su.tablespace,su.segtype, su.contents
from v$session se,v$sort_usage su
WHERE se.saddr=su.session_addr;
USERNAME        SID    SERIAL# SQL_ADDR MACHINE          PROGRAM          TABLESPACE       SEGTYPE   CONTENTS
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SYS             154         12 257A8240 WORKGROUP\LENOVO sqlplusw.exe     TEMP             SORT      TEMPORARY
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SQL> Alter system kill session '154,12';
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         0 SYSTEM
         1 UNDOTBS1
         2 SYSAUX
         4 USERS
         6 EXAMPLE
         7 DNA
     


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Error Message: ORA-24343 user defined callback error
Error Cause:
The only valid return value for a user defined callback function is OCI_ CONTINUE. Any other value will cause this error.
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     CREATE USER   DAVE IDENTIFIED BY   pwd
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