Oracle Database Understanding Lock Conflicts with dba_lock and Column Formatting
Sep 6, 2024 · 2 min read · Database SQL Performance Troubleshooting Oracle Database Administration Performance Tuning dba_lock ·Oracle Database: Understanding Lock Conflicts with dba_lock and Column Formatting Purpose This Oracle SQL query is designed to investigate and understand lock conflicts within your database, particularly those causing performance bottlenecks. It leverages the dba_lock view to expose critical lock information in a …
Read MoreIdentifying Locked Rows in Oracle Database using tables v$session and dba_objects Purpose This Oracle query pinpoints the exact row a specific session is waiting on due to a lock. It first finds the locked object and row location, then constructs a ROWID to fetch and display the entire locked row from the table. Sample …
Read MoreIdentify Locked Objects in Oracle Database
Sep 3, 2024 · 3 min read · Oracle Database Administration SQL v$locked_object dba_objects v$lock v$session ·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, …
Read MoreIdentifying Disabled Foreign Key Constraints in Oracle Database
Identifying Disabled Foreign Key Constraints in Oracle Database Purpose This SQL query is designed to identify and list all disabled foreign key constraints within an Oracle database. It provides information about the table and constraint name for each disabled foreign key. Sample SQL Command 1set lines 100 pages 999 …
Read MoreEnabling Disabled Foreign Key Constraints in Oracle Database
Aug 3, 2024 · 2 min read · Oracle SQL database DBA troubleshooting constraints Database Administration dba_constraints ·Enabling Disabled Foreign Key Constraints in Oracle Database Purpose This SQL query generates a list of SQL statements that can be executed to enable all disabled foreign key constraints in an Oracle database. Sample SQL Command 1set lines 100 pages 999 2select 'alter table …
Read MoreShow All Oracle Database Table Constraints This article delves into the world of Oracle Database constraints, empowering you to understand their types, statuses, and modification history. We'll dissect a powerful SQL query that retrieves this crucial information, making you a database management pro. Sample SQL Command …
Read MoreList Tables That Are Using the Specified Table as a Foreign Key Learn how to use an Oracle SQL query to identify tables referencing a specific table with foreign keys, understand database relationships, and ensure data integrity Sample SQL Command 1set lines 100 pages 999 2select a.owner 3, a.table_name 4, …
Read MoreOptimizing Undo Retention in Oracle Databases: A Practical Guide
May 12, 2024 · 2 min read · Database Administration SQL Commands Performance Optimization Data Management undo_retention oracle dba ·Optimizing Undo Retention in Oracle Databases We will explain how to optimize the undo_retention parameter in Oracle databases using the SQL command ALTER SYSTEM SET undo_retention = 500 SCOPE = MEMORY;. Understanding this parameter is crucial for effective transaction management, rollback capabilities, and maintaining …
Read MoreOracle Undo, A Deep Dive into DBA_UNDO_EXTENTS
May 11, 2024 · 3 min read · Oracle Database Database Administration Performance Tuning SQL Troubleshooting ·Oracle Undo: A Deep Dive into DBA_UNDO_EXTENTS Unlock the secrets of Oracle's undo mechanism with this in-depth guide to the DBA_UNDO_EXTENTS view. Learn how to analyze undo tablespace usage, interpret extent statuses (ACTIVE, UNEXPIRED, EXPIRED), and gain valuable insights for proactive database management. Avoid …
Read MoreReal-Time Oracle Rollback Detection, Is Your Database Undoing Changes?
May 10, 2024 · 3 min read · Oracle Database SQL Database Administration Performance Tuning Troubleshooting v$session v$transaction ·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, …
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