LU04.S05 - ERD: SchoolGrades_DB

• The attribut must be taken over and added with data-types and constraints (primary keys)
• The relations must be realized as relation tables, that connect the base tables
• The attributes of the relation tables are: id, and the primary key of each base table as foreign key
• Finally, the cardinalities must be added, which show how the relationships between the tables actually are.

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