Oracle Time Machine Evolution: FlashBack“He left by accident.” We humans tend to make mistakes. But what happens when this mistake is made by the database user. Is there a simple basket concept or a simple time travel concept?? The answer is YES, it exists. Sometimes it is just a simple query or some data cleaning methods used by users or data librarians, whatever the cause, data loss is a very common phenomenon. Backup and recovery methods are provided by Oracle database management systems that ensure the safety of valuable data in case of data loss, however, not all data loss situations can use the concepts of complete and tedious recovery from backup . Oracle introduced flashback capabilities from Oracle 9i onwards to meet simple data recovery needs. Oracle's Time Travel Concept: Oracle FlashbackOracle has developed a suite called Flashback Technology that allows Oracle application users and database administrators to turn back the clock and examine database objects and data in a previous state without having to restore using backup media. The Flashback query allows a user to quickly and easily view data as it was at a particular time in the past, even when it is modified and committed, whether it is a single row or the entire table. What situations require using flashback functionality? According to Oracle documentation, Flashback technologies are applicable to repair the following user errors.• Intentional or unintentional DROP TABLE statements• Intentional or unintentional update, delete, or insert• Intentional or unintentional batch job transactions inadvertent or widespread application errors There are more flashback features than you might imagine. All of these features were crammed into…half the paper…by the time you approached the FDA. This shows that Oracle Time Machine has become more advanced. In fact, it may occur before the introduction of Flashback functionality in the Oracle database and even before the launch of the Oracle RDBMS product. Database recovery is in your hands! If you have maintained history using some other mechanism, such as triggers, you can import that history into Flashback Data Archive. Conclusion: To compensate our errors resulting from accidental deletion of data and to recover the required data in the shortest span of time we can use Oracle Time Machine i.e. Flash Back technology. FlashBack concept can play a significant role in a flexible way to restore data affected by logical corruption. Since this is a unique feature of Oracle, there is a lot of documentation and support available for every step of implementation in an Oracle database
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