{"id":3841,"date":"2025-06-09T11:47:26","date_gmt":"2025-06-09T11:47:26","guid":{"rendered":"https:\/\/w3buddy.com\/?post_type=cposts&#038;p=3841"},"modified":"2025-06-09T11:47:28","modified_gmt":"2025-06-09T11:47:28","slug":"oracle-flashback-commands","status":"publish","type":"cposts","link":"https:\/\/w3buddy.com\/blog\/notes\/oracle-dba-d2d-tasks\/oracle-flashback-commands\/","title":{"rendered":"Oracle Flashback Commands"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A concise guide to essential Oracle Flashback commands for database recovery, restore points, and undoing changes. Useful for managing Flashback settings, querying historical data, and performing recovery to a specific point in time or SCN. Ideal for troubleshooting, data correction, and maintaining data integrity.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Check Flashback Status<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- Check if Flashback is enabled\nSELECT flashback_on FROM v$database;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Enable Flashback<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- Set recovery file destination and size\nALTER SYSTEM SET db_recovery_file_dest = '\/u01\/app\/oracle\/flash_recovery_area' SCOPE=BOTH;\nALTER SYSTEM SET db_recovery_file_dest_size = 10G SCOPE=BOTH;\n\n-- Enable Flashback (database must be in ARCHIVELOG mode)\nALTER DATABASE FLASHBACK ON;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Disable Flashback<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- Disable Flashback\nALTER DATABASE FLASHBACK OFF;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Create &amp; Drop Restore Points<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- Create guaranteed restore point\nCREATE RESTORE POINT FLASHBACK_PREP GUARANTEE FLASHBACK DATABASE;\n\n-- Drop restore point\nDROP RESTORE POINT FLASHBACK_PREP;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">List Restore Points<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- From SQL\nSELECT * FROM v$restore_point;\n\n-- From RMAN\nLIST RESTORE POINT ALL;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Flashback to Restore Point<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- Check available restore points\nSELECT name, time FROM v$restore_point;\n\n-- Flashback database to restore point\nSHUTDOWN IMMEDIATE;\nSTARTUP MOUNT;\nFLASHBACK DATABASE TO RESTORE POINT FLASHBACK_PREP;\nALTER DATABASE OPEN RESETLOGS;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Flashback to SCN or Timestamp<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- Flashback to specific SCN\nSHUTDOWN IMMEDIATE;\nSTARTUP MOUNT;\nFLASHBACK DATABASE TO SCN 202381;\nALTER DATABASE OPEN RESETLOGS;\n\n-- Flashback to specific timestamp\nFLASHBACK DATABASE TO TIMESTAMP TO_TIMESTAMP('2025-01-05 16:00:00', 'YYYY-MM-DD HH24:MI:SS');\nALTER DATABASE OPEN RESETLOGS;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Flashback Query (View Past Data)<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- Flashback query using exact timestamp\nSELECT * FROM W3BUDDY.EMP AS OF TIMESTAMP TO_TIMESTAMP('2025-01-05 10:00:00', 'YYYY-MM-DD HH24:MI:SS');\n\n-- Flashback query 1 hour ago\nSELECT * FROM W3BUDDY.EMP AS OF TIMESTAMP SYSDATE - 1\/24;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Flashback Dropped Table (Recycle Bin)<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- Check table in recycle bin\nSELECT object_name, original_name, createtime FROM recyclebin WHERE original_name = 'EMP';\n\n-- Restore with original name\nFLASHBACK TABLE int_admin_emp TO BEFORE DROP;\n\n-- Restore with new name\nFLASHBACK TABLE int_admin_emp TO BEFORE DROP RENAME TO int2_admin_emp;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Flash Recovery Area Usage<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- View Flashback area usage\nSELECT * FROM V$FLASH_RECOVERY_AREA_USAGE;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Determine Flashback Window<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- Check how far you can flashback (by time)\nSELECT TO_CHAR(oldest_flashback_time, 'DD-MON-YYYY HH24:MI:SS') AS \"Oldest Flashback Time\" FROM v$flashback_database_log;\n\n-- Check oldest SCN available\nSELECT oldest_flashback_scn FROM v$flashback_database_log;<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>A concise guide to essential Oracle Flashback commands for database recovery, restore points, and undoing changes. Useful for managing Flashback settings, querying historical data, and performing recovery to a specific point in time or SCN. Ideal for troubleshooting, data correction, and maintaining data integrity. Check Flashback Status Enable Flashback Disable Flashback Create &amp; Drop Restore [&hellip;]<\/p>\n","protected":false},"template":"","meta":{"googlesitekit_rrm_CAowu461DA:productID":""},"categories":[952,984],"class_list":["post-3841","cposts","type-cposts","status-publish","hentry","category-notes","category-oracle-dba-d2d-tasks"],"_links":{"self":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/cposts\/3841","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/cposts"}],"about":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/types\/cposts"}],"wp:attachment":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/media?parent=3841"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/categories?post=3841"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}