acid properties of transaction in dbms - Wikitechy https://www.wikitechy.com/interview-questions/tag/acid-properties-of-transaction-in-dbms/ Interview Questions Wed, 26 Oct 2022 10:07:01 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png acid properties of transaction in dbms - Wikitechy https://www.wikitechy.com/interview-questions/tag/acid-properties-of-transaction-in-dbms/ 32 32 What is Transaction in DBMS ? https://www.wikitechy.com/interview-questions/dbms/what-is-transaction-in-dbms/ https://www.wikitechy.com/interview-questions/dbms/what-is-transaction-in-dbms/#respond Wed, 26 Oct 2022 10:07:01 +0000 https://www.wikitechy.com/interview-questions/?p=5045
  • If we need one or more database access operations, we have a logical unit of processing called Database Transaction.
  • In simple, database transactions represent real-world events of any enterprise.
  • Database is inconsistent during the transaction.
  • Database is committed only once the state is changed from one consistent state to another.

    • State of Transactions

    Active State

    • A transaction is said to be in an active state when the execution process begins.
    • This is the state where read write operations are performed.

    Partially Committed

    • A Transaction is said to be in a partially committed state after the end of a transaction.

    Committed State

    • When a transaction is executed successfully, transaction is said to be in the committed state.
    • Changes made are recorded in the database permanently.

    Failed State

    • A transaction is considered to be in the failed state when any one of the checks fails, or when the transaction is aborted while it is in the active state.

    Terminated State

    • A transaction is said to be in the terminated state when certain transactions which are leaving the system cannot be restarted.

    ]]> https://www.wikitechy.com/interview-questions/dbms/what-is-transaction-in-dbms/feed/ 0 What is the concept of ACID properties in DBMS ? https://www.wikitechy.com/interview-questions/dbms/what-is-the-concept-of-acid-properties-in-dbms/ https://www.wikitechy.com/interview-questions/dbms/what-is-the-concept-of-acid-properties-in-dbms/#respond Fri, 03 Jun 2022 09:41:49 +0000 https://www.wikitechy.com/interview-questions/?p=4394

    ACID stands for Atomicity, Consisency, Isolation, and Durbility property. Multiple users can share data in a safe and secure way using these properties.

     Atomicity:

    • Atomicity is based on the principle of “either all or nothing” which means that if any updates  happens inside the database then that updates should be available for others beyond user and application.
    • If any updates happens inside the database then that updates should not be available for others beyond user and application.

    Consistency:

    • Inside a database before or after any transaction takes place this ensures that consistency is maintained.

    Isolation:

    • This property states that happens in isolation with other which means that any transactions that has started but not yet completed should be in isolation with others so that the other transactions are not affected by this transaction.

    Durability:

    • This property states that the data should always be in a durable state i.e. any data which is in the committed state should be available in the same state even if any failure or restart occurs in the system

    Transaction States in DBMS

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