Oracle Dba

Delete Archive Log Older Than 5 Days in Oracle RMAN Purpose The DELETE NOPROMPT ARCHIVELOG UNTIL TIME command removes old archive log files from your Oracle database to free up disk space and maintain storage efficiency. This RMAN (Recovery Manager) command automatically deletes archive logs that are older than a …

Oracle RMAN Crosscheck Backup Command - Verify Backup Availability Purpose The CROSSCHECK BACKUP command is an essential Oracle RMAN (Recovery Manager) tool that verifies whether backup files recorded in the RMAN repository still physically exist on storage media. This command synchronizes the logical records in your …

How to Stop Oracle Data Guard Broker Using ALTER SYSTEM Command Purpose The command ALTER SYSTEM SET dg_broker_start=false stops the Oracle Data Guard broker by shutting down the Data Guard monitor (DMON) background process. This command is essential when you need to disable broker management temporarily for …

How to Change Oracle AWR Retention Period to 14 Days using dbms_workload_repository.modify_snapshot_settings Purpose The Oracle code changes the Automatic Workload Repository (AWR) retention period from the default 8 days to 14 days (two weeks). This allows database administrators to store performance snapshots for a …

How to Uninstall Oracle Statspack Using the spdrop Script - Complete Guide Oracle Statspack uninstallation is accomplished using the @?/rdbms/admin/spdrop command, which completely removes the Statspack performance monitoring framework from your Oracle database. This command removes all associated objects including the …

Oracle SQL Performance Analysis Query - Monitor SQL Execution Statistics Purpose This Oracle SQL query is designed to analyze the performance characteristics of a specific SQL statement by examining key execution metrics stored in the v$sqlarea dynamic performance view. Database administrators and performance analysts …

Query to Display All Tablespaces Used by A Specified User and The Total Space Occupied (rounded to MB) A schema audit before a migration, a quota review before approving more space, or a tablespace consolidation project all start with the same question: which tablespaces does a specific Oracle user actually touch, and …

Oracle Table Privileges Granted to a Role via role_tab_privs Purpose ROLE_TAB_PRIVS holds the complete inventory of object privileges Oracle has packaged into each named role — every table, view, and sequence grant, the precise privilege type, whether the right covers the entire object or is scoped to a single column, …