Introduction to Real Time Databases

Transaction

It is said to be set of read or write operations

Query

A Transaction is said to be a query if it contains either a read or update operation

Commit is a point of no return, once a transaction is commited we are certain that, the changes to the database are permanent

ACID Properties of a General Purpose Databases

Atomicity

An action is said to be atomic, if it either completely done or not at all.

Consistency

A transaction transforms the database from one consistent state to another consistent state. A state is said to be a set of transactions.

Isolation

Until and unless a transaction is committed, the actions of it are not visible to any other transactions

Durability

After commit, the changes made to the databases are permanent

Conventional Databases will follow the ACID properties and it never violates

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