by Ron Kurtus (updated 17 March 2023)
SQL (Structured Query Language) is a computer language used to query or make commands to a database. It is structured to be relatively straightforward and simple to use. SQL is used with such databases as Microsoft Access, My SQL, and Microsoft SQL Server. It is often used with Web programming languages, such as ColdFusion, ASP, and PHP.
The purpose of these lessons is to provide you with the basics of using SQL to query a database. It is also useful for those studying Web programming and e-commerce.
Filtering Data Retrieved from a Database Table
Advanced Data Filtering (coming soon)
Creating Calculated Fields
Data Manipulation Functions