Learn how to create, insert, query, and choose between DATE and DATETIME data types in SQL, and understand their advantages and disadvantages.

Before you write any SQL query, you should have a clear idea of what data you are working with, where it comes from, how it is structured, and what you want to achieve with it. You should also ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.