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  1. Oct 11, 2023 · Learn what a transaction is in DBMS, its operations, states, and properties. A transaction is a set of logically related operations that access and modify the database data with consistency and integrity.

    • 35 min
  2. Learn what transactions are and how they are performed in DBMS with examples and steps. Understand the properties and states of transactions and the difference between DBMS and files system.

  3. Mar 12, 2024 · Learn how to ensure data consistency and avoid data inconsistency in DBMS with concurrency control. Understand the concepts of transactions, properties of transactions, and concurrency control protocols.

    • 35 min
  4. Learn what a transaction is and how it is performed in a database management system (DBMS). Understand the ACID properties of transactions and their implications for database reliability and consistency.

    • Active State – When the instructions of the transaction are running then the transaction is in active state. If all the ‘read and write’ operations are performed without any error then it goes to the “partially committed state”; if any instruction fails, it goes to the “failed state”.
    • Partially Committed – After completion of all the read and write operation the changes are made in main memory or local buffer. If the changes are made permanent on the DataBase then the state will change to “committed state” and in case of failure it will go to the “failed state”.
    • Failed State – When any instruction of the transaction fails, it goes to the “failed state” or if failure occurs in making a permanent change of data on Data Base.
    • Aborted State – After having any type of failure the transaction goes from “failed state” to “aborted state” and since in previous states, the changes are only made to local buffer or main memory and hence these changes are deleted or rolled-back.
  5. Following are the main operations of transaction: Read (X): Read operation is used to read the value of X from the database and stores it in a buffer in main memory. Write (X): Write operation is used to write the value back to the database from the buffer.

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  7. Jun 28, 2024 · Learn what a database transaction is, how it is executed as a single unit, and what are the ACID properties that ensure its integrity. Explore the different types of transactions based on application areas, timing, actions, and structure, and what is a schedule and serializability.