Relational database management systems (RDBMS) rely on an optimizer (or relational optimizer) that transforms SQL statements into executable code. Before any SQL statement can be run by the RDBMS, the ...

A relational DBMS organizes and accesses data according to relationships among data items. The relationships among data items are expressed by tables consisting of columns and rows. The order of the ...

A library database with three linked tables (Authors, Titles and Subjects). A classic example of relational database design, this would be nearly impossible to do in a spreadsheet but was easy to ...

A hierarchical database management system allows data to be stored in such a way that one data item is a subunit of other data. The system is ideal for storing data that has attributes and features.

The easiest way to think of NoSQL, is that of a database which does not adhering to the traditional relational database management system (RDMS) structure. Sometimes you will also see it revered ...

IBM Informix is a database server that focuses on relational database management. Review the basics of IBM Informix and how it stacks up against competitors. Image: Nikolay N. Antonov/Adobe Stock ...

Learn the key differences between relational and NoSQL databases with this in-depth comparison. There’s nothing wrong with the traditional relational database management system. In fact, many ...