Explain the acid properties of a transaction, Database Management System

Assignment Help:

Explain the ACID properties of a transaction

Ans: ACID properties are a significant concept for databases. The ACID stands for Atomicity, Consistency, Isolation, and Durability. 

Atomicity: Atomicity means either all operations of transaction are reflected properly in the database or none are.

Consistency: Consistency means execution of a transaction in isolation (that is with no other transaction executing concurrently) preserves the consistency of the database

Isolation: Although multiple transactions may execute concurrently the system assures that for each pair of transaction Ti and Tj, it appears to Ti that either Tj that either Tj finished execution previous to Ti started or Tj started execution after Ti finished. So each transaction is unaware of other transactions executing simultaneously in the system.

Durability: later than a transaction completes successfully, the changes it has made to the database persist, even if there are system failures.

 


Related Discussions:- Explain the acid properties of a transaction

Abap/4 statements to access internal tables without header, What should be ...

What should be declared explicitly in the corresponding ABAP/4 Statements to access internal tables without header lines & why? Work Area. This is needed as the Work Area is

Why are cursors necessary in embedded sql, Why are cursors necessary in emb...

Why are cursors necessary in embedded SQL? A cursor is an object used to store the output of a query for row-by-row processing through the application programs. SQL statements

What are the uses of functional dependencies, What are the uses of function...

What are the uses of functional dependencies? To test relations to see whether they are legal under a given set of functional dependencies. To state constraints on the set

Er model, There are a number of possible solutions to the open ended brief....

There are a number of possible solutions to the open ended brief. One of the simple ones is shown here without the PKs and FKs. It is important to think of how a number of tasks

What are the storage types, What are the storage types? The storage typ...

What are the storage types? The storage types are: a) Volatile storage b) Nonvolatile storage

#cursor, #what is cursor its uses ? Explain it

#what is cursor its uses ? Explain it

Create a database, The database will enable college administrators the abil...

The database will enable college administrators the ability to track students initial major. This will help college officials decide how best to prepare students for their goals an

What are the time stamps associated with each data item, What are the time ...

What are the time stamps associated with each data item? W-timestamp (Q) denotes the largest time stamp if any transaction that implemented WRITE (Q) successfully. R-timesta

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd