This document provides an overview of the evolution of database technologies from the 1960s to the present. It begins with navigational databases in the 1960s and relational databases in the 1970s. SQL databases emerged in the 1980s followed by object-oriented databases in the 1990s. NoSQL databases, including document, key-value, graph and time series databases, arose in the 2000s. The document then discusses using different database types together for various queries and applications. It provides examples of data structures and relationships that can be modeled across database types. Finally, it lists sessions at an upcoming conference focused on Redis technologies including RedisGears, RedisAI, RedisTimeSeries, RedisGraph and RediSearch.