Which of these are relational (SQL) databases?

Options

1. PostgreSQL and MySQL (Correct option)
2. Redis and MongoDB
3. Git and Docker
4. HTML and CSS

Answer

PostgreSQL and MySQL

Why

Relational databases store data in tables with rows and columns and use SQL: PostgreSQL, MySQL, Oracle Database, Microsoft SQL Server.

Redis (key-value store) and MongoDB (document store) are usually called NoSQL.

Git and Docker are developer tools, and HTML/CSS are web languages, not databases.

Remember

Tables + SQL = relational.

Key terms

• SQL
• NoSQL
• Table
• Relational database
• Redis
• HTML