A Database Management System (DBMS) is a software that uses a standard method of cataloging, retrieving, and running queries on data. It manages incoming data, organizes it, and provides ways for the data to be modified or extracted by users or other programs.
DBMS architecture is divided into three levels: Internal Level, Conceptual Level, and External Level. Here are some key concepts:
Data models define how data is connected and stored within the system. Here are some common data models:
SQL (Structured Query Language) is used to communicate with a database. Here are some key concepts:
Normalization is the process of organizing data to reduce redundancy and improve data integrity. Here are some key concepts:
A transaction is a unit of work that is performed against a database. Here are some key concepts:
Concurrency control manages the simultaneous execution of transactions in a multi-user database environment. Here are some key concepts:
Backup and recovery are techniques that ensure data is protected and can be restored in case of data loss. Here are some key concepts:
Database security refers to the collective measures used to protect and secure a database. Here are some key concepts: