Data analysis is no longer a specialist skill reserved for analysts. It now supports finance, trading, ecommerce, marketing, ...

This explains the COUNT function, which allows you to quickly calculate the total number of data items stored in a database (a warehouse of information). Just as the English word "count" implies, it ...

Explaining how to sort data from a database (a warehouse of information) into your preferred order (using the ORDER BY clause). Dates: Day before yesterday → Yesterday → Today ... (in chronological ...

Learn SQL basics in just 15 minutes with this tutorial focused on using SQL with MySQL. Topics covered include: - What SQL is ...