SQL/Relational Model (experimental)
NavDB provides an in-memory relational model with a subset of SQL.
As the SQL/relational model is still very new it is considered experimental and is not intended for any serious use beyond querying the system tables.
Data types: only the BOOLEAN, INTEGER, NUMERIC and VARCHAR data types are supported.
Objects: only tables and sequences are supported.
Queries: only the most basic SELECT statements are supported (no joins or subqueries).