Within the first two years, Brian made himself the leader of the group and was, uniquely, writer/producer/arranger/musician and lead vocalist of the band. It was clear from the very early years that Brian was the one destined to take The Beach Boys into the spotlight.
A logical design is a conceptual, abstract design. You do not deal with the physical implementation details yet; you deal only with defining the types of information that you need. The process of logical design involves arranging data into a series of logical relationships called entities and attributes. An entity represents a chunk of information. In relational databases, an entity often maps to a table. An attribute is a component of an entity and helps define the uniqueness of the entity.
Sybase Adaptive Server Enterprise. A relational database is a collection of data items organized as a set of formally-described tables from which data can be accessed or reassembled in many different ways without having to reorganize the database tables. The relational database was invented by E. F. Codd at IBM in 1970.