At the time of writing, both Vapor Fluent and Kitura Kuery support three popular implementations of relational databases: PostgreSQL, SQLite, and MySQL. A relational database uses a fixed-data format specified in the database's schema, compared to a non-relational (NoSQL) database, which doesn't require a fixed-data format. A relational database is much faster and more proven.
Installing databases
Installing PostgreSQL
PostgreSQL is the recommended native database driver for both Vapor and Kitura. The database is an open source project designed for enterprise use. PostgreSQL is designed for reliability, extensibility, and standards-compliance. Most cloud hosting services include PostgreSQL as one of the database...