What is the basic function of the database?

The basic functions of a database management system (DBMS) are as follows:

(1) data definition function. DBMS provides corresponding data language to define (DDL) database structure, which is a framework for describing database and stored in data dictionary.

(2) Data access function. DBMS provides data manipulation language (DML), which realizes the basic access operations of database data: retrieval, insertion, modification and deletion.

(3) Database operation management function. DBMS provides data control functions, that is, data security, integrity and concurrency control, effectively controls and manages database operations, and ensures the correctness and validity of data.

(4) The function of database establishment and maintenance. Including initial data loading, database dumping, recovery and reorganization, system performance monitoring and analysis.

(5) Transmission of database. DBMS provides the transmission of processing data, and realizes the communication between user programs and DBMS, usually working in cooperation with the operating system.