What's a Database? A SQL database is nothing more than an empty shell, like a vacant warehouse. It offers no real functionality whatsoever, but does provide a virtual space to store data. Data is stored inside of database objects called tables, and tables are the containers that actually hold specific types of data, such as numbers, files, strings, and dates.
A single database can house hundreds of tables containing more than 1,000 table columns each and they may be jam packed with relational data ready to be retrieved by SQL. Perhaps the greatest feature SQL offers is that it doesn't take much effort to rearrange your warehouse to meet your ever-growing business needs.