Vertica has a community tier, free up to 1TB of source data, and a 3 node limit.
SQL is not part of the Cassandra or Mongo feature sets. They have certain analytic possibilities, but not if you want to use SQL (window functions for example), or most of the BI client tools associated with data warehousing.
SQL is not part of the Cassandra or Mongo feature sets. They have certain analytic possibilities, but not if you want to use SQL (window functions for example), or most of the BI client tools associated with data warehousing.