A relational database is a database that can be perceived as a set of tables and manipulated in accordance with the relational model of data. It contains a set of objects used to store, manage, and access data. Examples of such objects are tables, views, indexes, functions, triggers, and packages.
A partitioned relational database is a relational database where the data is managed across multiple partitions (also called nodes). This partitioning of data across partitions is transparent to users of most SQL statements. However, some DDL statements take partition information into consideration (e.g. create nodegroup).