The purpose of the relational model is to provide a declarative method for specifying data and queries : users directly state what information the database contains and what information they want from it , and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries .
The purpose of the relational model is to provide a declarative method for specifying data and queries : users directly state what information the database contains and what information they want from it .