SQL - Fácil: uma interface amigável para acesso a banco de dados relacional.

Abstract

SQL-FACIL i s a use —friendly interface to access relational database based upon the concept of Un i versal Relation. This interface supports automatic inference for logical navigation, freeing the users from the preoccupation about the logic organization of data in the database. The independence from logic navigationis not provided by thes tandard SQL interface. The users of SQL-FACIL express the irqueries using a t tributes, selective conditions on a t tributes and relations ' names from the Universal Relation window; there i s no explicit statement on the join of relations nor the utilization of tuplesin the statement of the queries .