7.2- ACID Properties Of RDBMS | ACID properties in dbms | DBMS Complete Syllabus With Examples 

7.2- ACID Properties Of RDBMS | ACID properties in dbms | DBMS Complete Syllabus With Examples
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Transactions & Concurrency Control In DBMS | Serializability | Recoverability | recovery System | Time stamp
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acid database explained
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acid properties in rdbms
A transaction can be defined as a unit or part of any program at the time of its execution. During transactions, data items can be read or updated or both.
ACID Properties of Transaction
The database system is required to maintain the following properties of transactions to ensure the integrity of the data.
1. Atomicity: A transaction must be atomic. Atomic transaction means either all operations within a transaction are completed or none.
2. Consistency: A transaction must be executed in isolation. It means variables used by a transaction cannot be changed by any other transaction concurrently.
3. Isolation : During concurrent transaction each transaction must be unaware of other transactions. For any transaction Ti , it appears to Ti
that any other transaction Tk is either finished before starting of Ti
or started after Ti finished.
4. Durability: Changes are made permanent to the database after successful completion of transaction even in the case of system failure or crash.
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