Erd Designing

In: Computers and Technology

Submitted By dherms
Words 373
Pages 2
For this assignment I want to know what players in the NFL are involved in a charity. We only care about the AFC players just for the sake of minimizing the data that would be entered into the DB. Each AFC team has at least one offensive and defensive player involved in a charity. The DB will keep track of what players belong to what team and vice versa. A player can only belong to one team, but one team will have many players. Each player in the DB will have the following attributes, their player number (unique), whole name, jersey number, and the player type discriminator to make it easy to search for even though it could create redundancy. Each player will be categorized into one of two sub-groups of players, offensive and defensive players. NFL players cannot play on both sides of the ball (a player can either be an offensive or defensive player, not both), due to the new collective bargaining agreement. For offensive players we want to keep track of what position they play, offensive players can only play one position due to a safety rule. For defensive players we want to keep track of which position they play, but unlike offensive players a defensive player can play multiple positions. For each team the DB will track the team name (which is unique) and the team location. Each player in this DB will be involved with at least one charity, and possibly others. Each charity in this DB will have at least one player associated with it, and possibly others as well. For each charity the DB will track the name of the charity, and the charity number (which is unique).


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