3] DBgate Next, DBgate. It is another free open-source database that offers support for both SQL and NoSQL databases. This includes MySQL, Oracle, MongoDB, SQLite, PostgreSQL, and more. It offers ...

Mapping SQL Data to a Key-Value Store The SQL Layer needs to manage two types of data, namely metadata of the information schema, which describes the tables present and the indexes available.

Database support has been upgraded to include Apache Hive 2.1, Cloudera 5.8, DB2 LUW 11.1, Hortonworks 2.5, MapR 5.1, MongoDB 3.4, MySQL 5.7, PostgreSQL 9.5, SQL Server 2016, Vertica 8, VoltDB 6.8 ...