The JDBC API was designed to keep simple things simple. This means that the JDBC makes everyday database tasks easy. This trail walks you through examples of using JDBC to execute common SQL statements, and perform other objectives common to database applications.
Note: legacy REST API was found at WooCommerce > Settings > API prior to WooCommerce 3.4. Legacy REST API is deprecated and should be removed from WooCommerce soon, as alternative there’s a new REST API that is an integration the WordPress REST API, this the WooCommerce current REST API and it’s also enabled by default.