What is SQL?

Question

What is SQL? Exaplin

Vijay Singh · Answer

SQL (Structured Query Language) is a programming language used to communicate with and manipulate databases. It is the standard language for relational database management systems (RDBMS) such as MySQL PostgreSQL Microsoft SQL Server Oracle and SQLite. SQL is used for tasks such as querying data inserting updating and deleting records creating and modifying database schemas and managing permissions. SQL consists of several types of statements including: Data Manipulation Language (DML) : These statements are used to retrieve insert update and delete data from a database. Common DML statements include SELECT  INSERT  UPDATE  and DELETE . Data Definition Language (DDL) : These statements are used to define and modify the structure of database objects such as tables indexes and views. Common DDL statements include CREATE  ALTER  DROP  and TRUNCATE . Data Control Language (DCL) : These statements are used to control access to data within the database. Common DCL statements include GRANT and REVOKE  which are used to grant and revoke privileges respectively. Data Query Language (DQL) : This subset of SQL is focused specifically on querying data. The primary statement used for querying data is the SELECT statement. SQL is a powerful and flexible language that allows users to perform complex operations on data stored in a database. It provides a standardized way to interact with databases regardless of the underlying RDBMS making it an essential skill for anyone working with data.

Sachin Mishra · Answer

SQL stands for Structured Query Language. It is a programming language designed for managing and manipulating relational databases. SQL is commonly used for tasks such as querying data updating data inserting data deleting data and creating and modifying database schema (such as tables indexes and views).SQL operates through standardized commands which are used to interact with the database. These commands are categorized into several types:Data Query Language (DQL): Commands used to retrieve data from the database. The primary command in this category is SELECT.Data Manipulation Language (DML): Commands used to manipulate data in the database. Common commands in this category include INSERT UPDATE and DELETE.Data Definition Language (DDL): Commands used to define the structure of the database including creating altering and dropping database objects such as tables indexes and views. Common commands in this category include CREATE ALTER and DROP.Data Control Language (DCL): Commands used to control access to the data within the database. These commands include GRANT and REVOKE.SQL is widely used in various industries and applications where data management is crucial such as web development data analysis and enterprise software systems. It's essential for anyone working with databases to have a solid understanding of SQL.