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所在平台: Udemy |
课程主页: https://www.udemy.com/course/oracle-flashback-technology-data-recovery-and-archiving/
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Oracle Flashback技术：数据恢复与归档 本课程深入探讨Oracle Flashback技术，旨在帮助数据库管理员（DBA）和开发人员掌握强大的数据恢复和归档能力。您将学习如何应对人为错误、逻辑数据损坏和意外数据更改。 **第一部分：Flashback技术概述与撤销管理** 介绍Flashback技术核心概念，重点关注撤销（undo）管理，以及如何利用Flashback功能撤销数据更改并有效管理撤销表空间。学习内容包括处理意外删除场景，利用Flashback进行删除和更新操作。 **第二部分：Flashback操作的前提条件** 阐述使用Flashback功能所需的环境配置，包括启用归档日志模式（Archive Log Mode），以及使用版本查询（Version Query）和事务查询（Transaction Query）来追踪数据变化。 **第三部分：Flashback Table操作** 深入学习使用Flashback Table将表恢复到特定时间点或恢复点（Restore Point）的状态，并了解在此过程中索引的行为。内容涵盖理论概念、时间戳恢复和恢复点实验室示例，以及索引管理。 **第四部分：Flashback Table to Before Drop** 讲解如何恢复被删除（Drop）的表，包括理论概述、深度分析以及实际操作示例。此外，还将涵盖截断（Truncate）表和多次删除表后的恢复场景。 **第五部分：Flashback Database** 介绍Flashback Database功能，允许将整个数据库回放到指定时间点。学习其概念、限制、对数据文件的影响，以及使用系统更改号（SCN）和恢复点的实际操作。重点包括正常模式和保证恢复点之间的区别。 **第六部分：Flashback Data Archive** 探索Flashback Data Archive（FDA）在长期数据保留和审计方面的强大功能。学习如何创建、管理以及使用FDA来保存历史数据，包括高级管理技术和将表分配给不同的FDA对象，以及管理Flashback事务。 **课程结语** 通过本课程的学习，您将能熟练运用Oracle Flashback技术，有效应对数据丢失，管理历史数据归档，确保数据完整性。您将具备处理数据恢复场景、优化撤销表空间以及利用Oracle Flashback功能保护数据库的实用技能。
Oracle Flashback Technology provides powerful and efficient ways to recover from human errors, logical data corruptions, and unwanted changes to your database. This course, Oracle Flashback Technology: Mastering Data Recovery and Archiving, is designed to guide you through the extensive capabilities of Flashback features. You'll learn how to recover deleted data, restore tables, roll back transactions, and manage historical archives. Whether you are a Database Administrator (DBA) or a developer, this course will enhance your data recovery skills and deepen your understanding of Oracle's data protection mechanisms.Section 1: Introduction to Flashback TechnologyThis section introduces the core concepts of Oracle Flashback Technology, focusing on undo management and recovering from accidental deletions. You will learn how to use Flashback features to reverse data changes and manage undo tablespace effectively.Lecture 1: Overview and Undo Management (Preview enabled)Lecture 2: Handling Accidental Delete ScenariosLecture 3: Utilizing Flashback for Deletes and UpdatesSection 2: Requirements for Flashback OperationsTo effectively use Flashback capabilities, certain database configurations must be in place. This section covers the prerequisites, such as enabling Archive Log Mode and using version and transaction queries to track changes.Lecture 4: Enabling Archive Log Mode (Preview enabled)Lecture 5: Version Query for Delete and Commit OperationsLecture 6: Understanding Transaction QueriesLecture 7: Advanced Transaction Query TechniquesSection 3: Flashback Table OperationsIn this section, you'll explore how to use Flashback Table to recover tables to a previous state using timestamps or restore points. You'll also learn about the behavior of indexes during these operations.Lecture 8: Theoretical Concepts of Flashback TableLecture 9: Flashback Table to Timestamp - Lab ExampleLecture 10: Flashback Table to Restore Point - Lab ExampleLecture 11: Managing Index Behavior during Flashback Table OperationsSection 4: Flashback Table to Before DropOracle Flashback provides the capability to restore dropped tables. This section covers the theory and practical applications of Flashback Table to Before Drop, including handling cases where tables are dropped multiple times.Lecture 12: Flashback Table to Before Drop - Theoretical OverviewLecture 13: In-depth Analysis of Flashback Table to Before DropLecture 14: Simple Example of Restoring a Dropped TableLecture 15: Using Flashback Table for Truncated TablesLecture 16: Restoring Tables Dropped Multiple TimesSection 5: Flashback DatabaseFlashback Database allows you to rewind your entire database to a previous point in time. This section covers the concepts, restrictions, and effects on data files, along with examples using System Change Numbers (SCNs) and restore points.Lecture 17: Concepts and Restrictions of Flashback DatabaseLecture 18: Impact on Data Files and Continuous Log ModeLecture 19: Flashback Database and Enabling Flashback Log ModeLecture 20: Rewinding Database using SCN - Practical ExampleLecture 21: Differences between Normal and Guaranteed Restore PointsSection 6: Flashback Data ArchiveFlashback Data Archive (FDA) provides a robust solution for long-term data retention and auditing. This section dives into creating, managing, and utilizing Flashback Data Archives to preserve historical data.Lecture 22: Overview of Flashback Data Archives - Concepts, Creation, and ManagementLecture 23: Advanced Management of Flashback Data ArchivesLecture 24: Assigning Tables to Various Flashback Data Archive ObjectsLecture 25: Managing Flashback TransactionsConclusion:By the end of this course, you will be proficient in using Oracle Flashback Technology to recover from data loss, manage historical archives, and ensure data integrity. You'll be equipped with practical skills to handle data recovery scenarios, optimize undo tablespace, and leverage Oracle's Flashback features to safeguard your database.
