Transactions and Rollbacks in DBMS
Order ID:89JHGSJE83839 Style:APA/MLA/Harvard/Chicago Pages:5-10 Instructions:
Transactions and Rollbacks in DBMS
A database management system (DBMS) is a software system that allows users to interact with a database, typically through a user interface or application. One important aspect of a DBMS is its ability to handle transactions and rollbacks.
A transaction is a sequence of database operations that are performed as a single unit of work. Transactions are typically used when a series of operations need to be performed together, such as transferring funds between bank accounts or updating a customer record. In order for a transaction to be successful, all of the operations within the transaction must be completed successfully. If any one of the operations fails, the entire transaction must be rolled back.
Rollback is the process of undoing the changes made to the database during a transaction. When a transaction fails, the DBMS must ensure that the database is returned to its previous state, as if the transaction had never been attempted. This involves undoing all of the changes that were made during the transaction, including any inserts, updates, or deletes.
To ensure that transactions are handled correctly, most DBMSs use a technique called the ACID properties. ACID stands for Atomicity, Consistency, Isolation, and Durability, and refers to a set of characteristics that ensure that transactions are processed in a reliable and predictable manner.
Atomicity ensures that a transaction is treated as a single, indivisible unit of work. All operations within the transaction are either completed successfully or are rolled back if any of them fail.
Consistency ensures that the database remains in a consistent state before and after the transaction. This means that any constraints or rules that are defined for the database are not violated by the transaction.
Isolation ensures that multiple transactions can be processed concurrently without interfering with each other. Each transaction is treated as if it is the only transaction being processed, so that the changes made by one transaction are not visible to other transactions until the first transaction is completed.
Durability ensures that once a transaction is committed, its effects are permanent and cannot be undone. This means that even if the DBMS crashes or the system is shut down, the changes made by the transaction will not be lost.
In summary, transactions and rollbacks are essential components of a DBMS. Transactions ensure that a sequence of database operations is treated as a single, indivisible unit of work, and rollbacks ensure that the database is returned to its previous state if a transaction fails. The ACID properties ensure that transactions are processed in a reliable and predictable manner, ensuring that the database remains consistent and reliable.
Transactions and Rollbacks in DBMS
RUBRIC
Excellent Quality
95-100%
Introduction 45-41 points
The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.
Literature Support
91-84 points
The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.
Methodology
58-53 points
Content is well-organized with headings for each slide and bulleted lists to group related material as needed. Use of font, color, graphics, effects, etc. to enhance readability and presentation content is excellent. Length requirements of 10 slides/pages or less is met.
Average Score
50-85%
40-38 points
More depth/detail for the background and significance is needed, or the research detail is not clear. No search history information is provided.
83-76 points
Review of relevant theoretical literature is evident, but there is little integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are included. Summary of information presented is included. Conclusion may not contain a biblical integration.
52-49 points
Content is somewhat organized, but no structure is apparent. The use of font, color, graphics, effects, etc. is occasionally detracting to the presentation content. Length requirements may not be met.
Poor Quality
0-45%
37-1 points
The background and/or significance are missing. No search history information is provided.
75-1 points
Review of relevant theoretical literature is evident, but there is no integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are not included in the summary of information presented. Conclusion does not contain a biblical integration.
48-1 points
There is no clear or logical organizational structure. No logical sequence is apparent. The use of font, color, graphics, effects etc. is often detracting to the presentation content. Length requirements may not be met
You Can Also Place the Order at www.collegepaper.us/orders/ordernow or www.crucialessay.com/orders/ordernow