VDA stands for Vala Data Access, is a library designed to provide moder access to databases, using an Object Oriented API based on GObject and written in Vala.
Access VDA's documentation for:
VDA provides a native implementation to PostgreSQL and SQLite, implementing its interfaces to demostrate how is possible to add new database connection implementations.
GDA stands for GNOME Data Access, is a library used to implement VDA to access databases binded by GDA.
Currently PostgreSQL and SQLite providers are implemented