Identifying Locked Rows in Oracle Database using tables v$session and dba_objects Purpose This Oracle query pinpoints the exact row a specific session is waiting on due to a lock. It first finds the locked object and row location, then constructs a ROWID to fetch and display the entire locked row from the table. Sample …

Identify Locked Objects in Oracle Database using v$locked_object, dba_objects, v$lock and v$session Purpose The provided Oracle Database code is a SQL query designed to identify locked objects within a database. It provides detailed information about the locked objects, including the username, session ID, object name, …

Oracle Database: Real-Time SQL Tracing for In-depth Performance Insights Purpose This Oracle database technique empowers you to dynamically enable or disable SQL tracing for specific sessions. SQL tracing captures detailed information about SQL statements executed within a session, providing valuable insights into …

Real-Time Oracle Rollback Detection: Is Your Database Undoing Changes? This SQL query monitors real-time rollbacks in Oracle databases. It identifies which sessions are actively undoing changes and tracks their progress by observing the used_ublk value (the number of undo blocks in use). When used_ublk reaches zero, …

Show all Active SQL for Sessions using v$session and v$sqlarea Gain real-time insights into currently active user sessions and the SQL statements they are executing to troubleshoot performance issues and optimize resources SQL Code 1set feedback off 2set serveroutput on size 9999 3column username format a20 4column …

List all open oracle cursors by user or username Track open cursor usage across user sessions to identify potential resource constraints or inefficiencies in database access patterns SQL Code 1set pages 999 lines 300 2col username format a40 3select sess.username as username 4, sess.sid as sid 5, sess.serial# as serial …

Display Session status associated with the specified os process id SQL Code 1select s.username 2, s.sid 3, s.serial# 4, p.spid 5, last_call_et 6, status 7from V$SESSION s 8, V$PROCESS p 9where s.PADDR = p.ADDR 10and p.spid='&pid' 11/ Sample Oracle Output 1Enter value for pid: 9999 2old 10: and p.spid='&pid' 3new 10: …

Display the users current Session SQL SQL Code 1Select sql_text 2from v$sqlarea 3where (address, hash_value) in 4(select sql_address, sql_hash_value 5 from v$session 6 where username like '&username') 7/ Sample Oracle Output 1Enter value for username: sys 2old 6: where username like '&username') 3new 6: where username …

Select Oracle user info including os pid SQL Code 1col "SID/SERIAL" format a10 2col username format a20 3col osuser format a15 4col program format a50 5select s.sid || ',' || s.serial# "SID/SERIAL" 6, s.username 7, s.osuser 8, p.spid "OS PID" 9, s.program 10from v$session s 11, v$process p 12Where s.paddr = p.addr …

Oracle sessions sorted by logon time Track idle time for user sessions to uncover potential resource leaks, optimize database performance, and maintain security best practices. SQL Code 1et lines 100 pages 999 2select username 3, floor(last_call_et / 60) "Minutes" 4, status 5from v$session 6where username is not null …