0
0
jaggy
answered May 1 '23 00:00
Structured Query Language (SQL) is a standard language used to manage relational databases . It is used to store, manipulate, and retrieve data stored in relational databases. SQL provides a set of commands and functions to interact with the data stored in the database.
SQL consists of three main components: Data Definition Language (DDL) , Data Manipulation Language (DML) , and Data Control Language (DCL) .
DDL is used to define the database structure and schema, including tables, columns, indexes, and relationships. It consists of commands like CREATE, ALTER, DROP, and TRUNCATE.
DML is used to manipulate the data stored in the database. It consists of commands like SELECT, INSERT, UPDATE, and DELETE.
DCL is used to control access to the database, including permissions and security. It consists of commands like GRANT and REVOKE.
SQL is widely used in the industry and is supported by most relational database management systems, including MySQL, Oracle, Microsoft SQL Server, and PostgreSQL. SQL has become a fundamental tool for developers and data analysts to manage and analyze data efficiently.