Meaning of SQL

Simple definition

SQL (Structured Query Language) is a programming language used to manage and manipulate relational databases. It allows users to retrieve, update, insert, and delete data stored in databases.

How to use SQL in a professional context

SQL is a standard language used in various database systems, such as MySQL, PostgreSQL, and Microsoft SQL Server, for tasks like data retrieval and database management.

Concrete example of SQL

A developer uses SQL to query a customer database and find all customers who made a purchase in the last month.

What is a SQL query?

A SQL query is a request made to a database to retrieve or manipulate data.

What are the basic SQL commands?

The most common SQL commands are SELECT, INSERT, UPDATE, DELETE, and CREATE.

What is a relational database?

A relational database organizes data into tables that are related to each other using keys.

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