Evolution of Oracle Time Machine: FlashBack
“It’s gone by mistake”. We human beings are tend to make mistakes. But what happens when this mistake committed by database user. Is there any simple recycle bin concept or simple time travelling concept?? The answer is YES, there is.
Sometimes it’s just simple a query or some data cleansing methods used by the users or data librarians, whatever may the cause be, data-loss is a very common phenomenon. Backup and recovery methods are provided by the Oracle database management systems which ensure the safety of valuable data in case of data loss however, not all data-loss situations can utilize the complete and tedious recovery concepts from the backup. Oracle introduced flashback features from Oracle 9i onwards to address simple data recovery needs.
Oracle time travel concept: Oracle Flashback
Oracle developed a suite named Flashback Technology which enables Oracle application users and database administrators to wind the clock back and examine their database objects and data in a previous state without having to restore using backup media.
Flashback query allows a user to view the data quickly and easily the way it was at a particular time in the past, even when it is modified and committed, be it a single row or the whole table.
What situations call for the use of the flashback feature?
According to the Oracle documentation, Flashback technologies are applicable in repairing the following user errors.
• Intended or unintended DROP TABLE statements
• Intended or unintended update, delete or insert transactions
• Intended or unintended batch job or wide-spread application errors
There are more features of flashback that one can imagine. All these features have been piled up wi...
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...e moment you turned on the FDA. This proves that Oracle Time machine got more advanced. In fact, it can go to before the introduction of the Flashback feature in the Oracle Database and even before the launch of the Oracle RDBMS product. You database recovery is in your hands! If you have been maintaining history using some other mechanism, such as triggers, you can import that history into Flashback Data Archive.
Conclusion: To compensate our mistakes for deleting data accidentally and to get back our required data within 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 effected from logical corruption.
Since it’s an Oracle unique feature, there are many documentations and support available for every steps of the implementation in an Oracle database
An example of a bad memory is one night Melinda can’t sleep so she goes out onto the roof of her house and has a flashback of the night she was assaulted.
Retrograde amnesia differs from anterograde amnesia in one important way, where the memory trouble occurs. With retrograde amnesia one will suffer from loss of memory for all memories that take place before the onset of the disorder. Except for a few isolated memories, one cannot bring to mind any memories from before their amnesia occurred. Over time one could start recovering their memories and recover their past. Anterograde amnesia refers to the inability to store memories into long term memory after the onset of amnesia. With anterograde amnesia one has trouble learning and remembering things after they have read them. All of one’s previous memories still exist however, and that individual has no problem remembering these events with anterograde amnesia. Retrograde amnesia, you lose past memories, anterograde
Amnesia, a severe long-term memory loss disease, is caused by damaged brain tissue. There are two different types of amnesia. Retrograde amnesia is also known as backward moving. This is when you have a hard time remembering the past, especially episodic memories. This occurs because of memory consolidation. Memory consolidation is the process of a new memory setting until it becomes permanently in the brain. If this process is disrupted, the memory may be lost (Hockenberry and Hockenberry page 265). Anterograde amnesia is also known as forward moving. This is when you are unable to form new
Flashbacks are an interruption of an event or chronological sequence to insert past events or background context that relates to the current event. Flashbacks are important in the story to help the readers understand why the character or the character’s are doing
middle of paper ... ... In general, the smaller the degree of retrograde amnesia, the less significant the head injury. Anterograde amnesia is caused as a result of the complex systems in the brain being damaged. The chemical balance in the brain is upset.
Helen makes a great point because it wasn’t until a few years ago that technology exploded and began to create all these different forms of databases that can do...
Some faculties and departments are already using Oracle applications in their day-to-day operations. As time goes by, more and more information users will be working with an application based on Oracle database technology. If you get the opportunity to be a member of an application development team, you will become familiar with the workings of Oracle and relational databases. Other users may have to learn about this popular database management system through their own experience. This article is for our readers who, as of yet, have no access to Oracle databases but have a yearning for learning what they're all about.
In 1977, Larry Ellison, Bob Miner, and Ed Oates founded System Development Laboratories. After being inspired by a research paper written in 1970 by an IBM researcher titled “A Relational Model of Data for Large Shared Data Banks” they decided to build a new type of database called a relational database system. The original project on the relational database system was for the government (Central Intelligence Agency) and was dubbed ‘Oracle.’ They thought this would be appropriate because the meaning of Oracle is source of wisdom.
Memory encompasses information that has been learned and stored over a period of time. Once an event is stored in our memory it can be readily retrieved. Amnesia occurs when there is partial or complete memory loss. There are two types of memory loss: anterograde amnesia and retrograde amnesia—which can be a result of either an organic cause, damage to the brain by physical injury; drug usage; mental disorders; or post-traumatic stress (Mastin).
In 2010, Oracle acquired Sun Microsystems and made marking the company’s entry into the hardware market. This deal entailed that Oracle would pay $7.4 billion (Montalbano, 2009). In return, this would enable Oracle to deliver complete and “integrated computer systems – from database to disk – that would be optimized for easier management, enhanced security, improved reliability and high performance while at the same time reducing the total cost of ownership” (Montalbano, 2009). Prior to this event, the company has never had a server ...
with reference to his isolation from the outside and the speaker’s obsession with Breda. In The Entire History of You, Liam was obsessed with finding the truth of the situation, without understanding why he was so obsessed and how he would react to the truth if it was what he feared. Liam obsesses over Fi’s past among many other things and the technological advancement makes it easy for him to confirm those suspicions. Directly analysing the writer’s ideas, I did not think the memory chip was far off from what humans do already. From what I heard in the movie it was clear that you could alter some memories and eliminate some the only thing you could not do was add ones that do not exist.
DBA deals with all of this by finding user needs, set the database, and test the system. DBA should enable editing any system he or she created. At the same time DBA should ensure the security of the data and guarantee data integrity and backup. Moreover, DBAs should know the database management systems (DBMS) that include the knowledge of Oracle, IBM DB2, and Microsoft SQL server (“Database Administrator,” 2010). Oracle is one of the most important platforms that DBA must know and have experience with. According to Kanaracus “The database experience we look for most of the time is Oracle”, says Tom Hart, executive vice president of the operations and technology group at Veritude. “SQL Server is more of a nice-to-have"
[7] Elmasri & Navathe. Fundamentals of database systems, 4th edition. Addison-Wesley, Redwood City, CA. 2004.
Databases are becoming as common in the workplace as the stapler. Businesses use databases to keep track of payroll, vacations, inventory, and a multitude of other taske of which are to vast to mention here. Basically businesses use databases anytime a large amount of data must be stored in such a manor that it can easily be searched, categorized and recalled in different means that can be easily read and understood by the end user. Databases are used extensively where I work. In fact, since Hyperion Solutions is a database and financial intelligence software developing company we produce one. To keep the material within scope I shall narrow the use of databases down to what we use just in the Orlando office of Hyperion Solutions alone.
The Time Machine by H.G. Wells, a novel about a man’s journey through the future or criticism to the evolution of human race? The Time Traveler sets out on this journey not knowing what he would find or see in the year 802,701. When he arrives he comes across people known as the Eloi. The Eloi are uneducated, small beautiful creature who don’t work or have any political issues. What seems at first like a utopian society that he heard of in the 19th century, turns out to be quite different as he finds out about the creatures who live under ground, the Morlocks. The Morlocks are the “working class” and creatures that consume Elois. By providing these two different classes Wells is trying to prove the devolution of society through the knowledge of the “upper class” and “lower class” in the Victorian Era. Throughout the Time Machine H.G Wells tries to demonstrate how the