1. Introduction to ANSI SQL and MySQL

Overview of ANSI SQL

ANSI SQL (American National Standards Institute SQL) is a standardized language used for managing and querying relational databases. The primary goal of ANSI SQL is to ensure portability across different database systems like MySQL, PostgreSQL, SQL Server, and Oracle.

Introduction to MySQL

MySQL is an open-source relational database management system (RDBMS) based on SQL. It is widely used in web applications, enterprise solutions, and data management systems. MySQL supports ANSI SQL with additional proprietary features.

Importance of Standard SQL

• Provides a common syntax across different database systems.
• Helps developers and analysts write portable queries.
• Enhances interoperability between different database platforms.
• Facilitates database migration and vendor independence.

Data Retrieval with SELECT Statement

The SELECT statement is fundamental in SQL, allowing users to retrieve specific data from a database. It can be combined with filtering, sorting, and aggregation to extract meaningful insights.

1. Basic SELECT Syntax

Syntax:

SELECT column1, column2, ... FROM table_name;

Example:

Consider a table employees: