Db2 is a family of data management products, including database servers, developed by IBM. They initially supported the relational model, but were extended to support object–relational features and non-relational structures like JSON and XML.
Amazon Redshift is a data center product that is part of the broader Amazon Web Services cloud-computing network. The name implies moving away from Oracle, with red being an allusion to Oracle, whose corporate color is red and known informally as "Big Red."
BigQuery is a fully-managed, serverless data warehouse that enables scalable analysis over petabytes of data. It is a Platform as a Service that supports querying using ANSI SQL. It also has built-in machine learning capabilities. BigQuery was announced in May 2010 and made generally available in November 2011.
Yellowbrick Data was founded in 2014 by Neil Carson, Jim Dawson, and Mark Brinicombe to bring to market a next generation flash storage optimized data warehouse.
Amazon Aurora is a relational database service developed and offered by Amazon Web Services beginning in October 2014. Aurora is available as part of the Amazon Relational Database Service.