Databases constitute one of the key technologies that is spearheading the Information Revolution.
Relational database technology is serving as backbone for applications which need to manage terabytes of data. However, these applications have different characteristics than those that inspired the Relational Model and the technology that was developed around it. During the trip, she adds information for new sales, updates customer records and inputs notes that are useful to her. Her database is evolving independently of the main customer database. The same happens with several other salespersons who make and use their own replicas of portions of the customer database.