Relational database management system

Relational database management systems (RDMS) are like a giant filing cabinet. Inside the filing cabinet are lots of folders labeled with names - these folders are like 'tables' in a database. Inside each folder are sheets of paper - these sheets of paper are like 'rows' in a database. The sheets of paper all have the same format, with pieces of information (such as name, age, job, etc) written down in different columns - these columns are like 'columns' in a database. You can look up information in the filing cabinet by 'searching': telling the RDMS what information you want to find and it will give you the sheets you need.