SQL stands for Structured Query Language. This is the language that most of the relational databases understand. It helps in retirieveing needed information from a database by posing a question to the database, called a query.
Your next question would be:What is a relational database?
A relational database consists of a number of tables in which information is stored. Also these tables are related to each other. For example there are Customers who buy products. A customer can buy a number of products, so there is a relation between a customer and the product he buys. Customer information is stored in one table and the prodcut information is stored in another. This is a short explanation.
If you have any Office product on your computer you can practice SQL with the MS Access program.
HTH
