Tables-Data in a Relational Database Management System or RDBMS is stored in tables resembling spreadsheets. Indexes-Indexes are built on columns that are used to retrieve data; the master list of invoice items includes both the item names and the field containing their unique identifier indexed, as these would be most commonly used in retrieval. Views-A view is a representation of the data in a number of tables. For instance, the invoice item table could be combined in a view with the master invoice item list table, resulting in a single view that contains the invoice items with their names. Security-Relati onal databases have their own security system built in. Programmability -All relational databases come with SQL, or Structured Query Language, which is a programming language designed specifically to work with relational tables. Data Types-Relationa l Databases store data in the tables in different types of fields.