lib4d_sql is a C library that provides the required functions (connect, prepare, execute, etc.) for writing an SQL client for 4D databases. It uses the public 4D SQL protocol, which is supported by 4D products since version 11. It is already used by the PDO_4D Open Source project, and it might be used to provide others drivers for JDBC, ADO, or ActiveRecord.
KeyAccess is a light-weight object-relational mapping (ORM) tool for Java, using existing databases as the starting point to generate a domain model. Its main goal is to reduce and sometimes eliminate manual updating between your domain object model and the underlying databases, while still being able to use arbitrarily complex SQL queries. In addition, KeyAccess doesn’t mandate a special architecture or framework – it will work in any application using JDBC.
Awake SQL is a virtual JDBC Driver and a framework that enables remote JDBC access through HTTP. It allows Android and Java desktop app developers to use regular JDBC calls to access remote SQL databases in the cloud. It implements the main data types including blobs/clobs, and supports transactions. Security has been taken into account from the design stage: server-side configuration lets admins specify strong authentication and security rules in order to protect the databases.