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Intro

A database is a structured collection of data that is organized and stored in a way that allows for efficient retrieval, management, and manipulation of information. Databases are designed to store and manage large volumes of data in a structured and organized manner. They are a fundamental component of modern information systems and play a crucial role in various applications and industries.

ACID​

ACID is an acronym that stands for Atomicity, Consistency, Isolation, and Durability. It is a set of properties that guarantee reliable processing of database transactions. These properties ensure that database transactions are processed reliably even in the face of system failures.

Transactions​

In the context of databases, a transaction is a unit of work that represents a sequence of one or more database operations (such as queries, inserts, updates, or deletes) that need to be executed as a single, indivisible unit. The concept of transactions is essential in database management systems to ensure data consistency, integrity, and reliability, particularly in multi-user and concurrent database environments.

Lifecycle of Transactions​

The transactions would involve below list of steps

  • BEGIN Transaction:-- Start the trasaction from here
  • COMMIT Transaction:-- When all queries part of transaction success Commit them to make them permenent.
  • ROLLBACK Transaction:-- Revers all operations that were done when failed.
  • END Transaction:-- End the transaction here.