Question

Вкажіть функції СУБД​

Answer 1

Створення та редагування бази даних, її структури;

Вибір, пошук інформації за певними критеріями;

Захист цілісності даних.

Answer 2

Functions of a Database Management System (СУБД)

A Database Management System (DBMS) is a software system that allows users to create, manage, and manipulate databases. It provides a set of functions and tools to efficiently store, retrieve, and manipulate data. Here are some of the key functions of a DBMS:

1. Data Definition Language (DDL): DDL is used to define the structure and organization of the database. It includes creating, modifying, and deleting database objects such as tables, views, indexes, and constraints.

2. Data Manipulation Language (DML): DML allows users to insert, update, delete, and retrieve data from the database. It provides commands like SELECT, INSERT, UPDATE, and DELETE to perform these operations.

3. Data Query Language (DQL): DQL is used to retrieve data from the database. The most common DQL command is SELECT, which allows users to specify the data they want to retrieve based on certain conditions.

4. Data Control Language (DCL): DCL is used to control access to the database. It includes commands like GRANT and REVOKE, which grant or revoke privileges to users or roles.

5. Transaction Management: DBMS provides transaction management capabilities to ensure data integrity and consistency. It allows users to group multiple database operations into a single logical unit called a transaction. Transactions can be committed to make the changes permanent or rolled back to undo the changes.

6. Data Security and Authorization: DBMS provides mechanisms to secure the data stored in the database. It includes authentication and authorization features to control access to the database and its objects.

7. Data Backup and Recovery: DBMS provides backup and recovery mechanisms to protect against data loss. It allows users to create backups of the database and restore them in case of data corruption or system failures.

8. Data Integrity and Constraints: DBMS enforces data integrity by allowing users to define constraints on the data. Constraints ensure that the data stored in the database meets certain rules or conditions.

9. Concurrency Control: DBMS manages concurrent access to the database by multiple users or applications. It ensures that transactions are executed in an isolated and consistent manner to avoid conflicts and maintain data integrity.

10. Performance Optimization: DBMS includes optimization techniques to improve the performance of database operations. It includes query optimization, indexing, and caching mechanisms to minimize the response time and maximize throughput.

These are some of the key functions provided by a Database Management System (СУБД). Different DBMSs may have additional features and functionalities depending on their specific implementation and purpose.