Understanding SQL: DDL, DML, and data manipulation

📰 Dev.to · Tom Chege

Learn the basics of SQL commands, including DDL and DML, to effectively manage and manipulate data in databases

beginner Published 11 Apr 2026

Action Steps

Identify the differences between DDL (Data Definition Language) and DML (Data Manipulation Language) commands
Use DDL commands to create and modify database structures, such as tables and indexes
Apply DML commands to insert, update, and delete data in a database
Practice writing SQL queries using DDL and DML commands to manage a sample database
Test and execute SQL queries to ensure correct data manipulation and database structure modification

Who Needs to Know This

Data analysts, data scientists, and software engineers can benefit from understanding SQL commands to work with databases and perform data analysis

Key Insight

💡 Understanding the difference between DDL and DML commands is crucial for effective data management and manipulation in databases