Azure DocumentDB and Azure SQL Database are two of the primary cloud storage choices available on Azure. Choosing between them isn’t always easy – there is. Feature Oracle Postgres SQL Server IBM DB2 MySQL MariaDB Firebird H2 HSQLDB Derby SQLite; Queries: Window functions: Yes:. Jul 8, 2014. The open-source relational database — full name PostgreSQL — for which EnterpriseDB sells apps and services as well as its own commercial fork,…