Entity-Relationship Modeling: Foundations of Database Technology
Entity-Relationship Modeling: Foundations of Database Technology
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Query formulation is still a difficult task whenever a database schema is large or complex. The user has to entirely understand the schema before a correct and complete formulation of the query will be found. Furthermore, users may overlook types in the SQL schema that must be used in the query. Visualization based on Visual SQL leads to higher conceptual correctness and conceptual completeness.