Database Management Systems
An Introduction to SQLSimple Queries using the Select statementMore Complicated QueriesCreating Tables with the Data Definition LanguageModifying Tables with the Data Manipulation Language
The Structured Query Language is the universal query language among commercial relational database systems.
There are several lessons here that you will need to complete.
Links:
Database Management Systems
An Introduction to SQL
Simple Queries using the Select statement
More Complicated Queries
Creating Tables with the Data Definition Language
Modifying Tables with the Data Manipulation Language