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What do you understand about ACID properties in the context of Database Management Systems (DBMS)?

Answer»

The ACID properties for a TRANSACTION in SQL DBMS refers to the following properties:

  • Atomicity: Atomicity refers to the fact that DATA remains atomic. It means that if any operation on the data is conducted, it should either be performed or executed completely, or it should not be performed at all. It also implies that the operation should not be interrupted or just half completed. When performing operations on a transaction, the operation should be completed rather than partially.
  • Consistency: The term "consistency" denotes that the value should be retained at all times. The integrity of the data should be maintained in DBMS, which means that whenever a modification is made to the database, it should always be preserved. The integrity of the data is critical in transactions so that the database remains consistent before and after the transaction. The information should always be accurate.
  • Isolation: The term "isolation" refers to the act of being separated from others. Isolation in DBMS refers to the property of a database where no data from one database should impact the other and where many transactions can take place at the same time. In other words, when the operation on the first database is finished, the process on the second database should begin. It indicates that if two actions are conducted on two different databases, the value of one database may not be affected by the value of the other. When two or more transactions OCCUR at the same time in the case of transactions, consistency should be maintained. Any modifications made in one transaction will not be visible to other transactions until the change is committed to the memory.
  • Durability: The term "durability" refers to something's ability to last. The term durability in DBMS refers to the fact that if an operation is completed successfully, the data remains permanent in the database. The database's durability should be such that even if the system fails or crashes, the database will survive. However, if the database is lost, the recovery manager is responsible for guaranteeing the database's long-term viability. Every time we make a change, we must USE the COMMIT COMMAND to commit the values.


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