Try reading this e-book – ‘The Definitive Guide to Graph Databases for the RDBMS Developer’ - There are some who would have you believe that the relational database has had its day. This is simply not the case. Devised in the 1970s as a new way to structure data for easy accessibility, the RDBMS is still a staple of the developer universe and the reliable cornerstone of many of today's most mission critical applications.