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

Learn how to write accurate, reliable, and efficient SQL queries for database engineering. Follow these tips and best practices to understand the data, write clear code, test and validate queries ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...