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( please draw it by hand ) Case 1 : Consider a database to store information about a Sports Organization. The database has the following
please draw it by hand Case : Consider a database to store information about a Sports Organization. The database has the following properties:
Each league has a name and unique league ID integer The NFLNational Football League is an example of a sports league.
A league may be affiliated with one or more teams.
Every team is affiliated with exactly one league.
We store the name, colors, and unique team ID integer for each team. For example, the name of Pittsburgh's football team is the 'Steelers' and their team colors are 'black & gold'.
A team has exactly one home stadium. A stadium may be a home to zero or more teams. For example, the home stadium of the Pittsburgh's baseball team, the Pirates, is PNC Park'.
For home stadiums, we record a city, name, and unique stadium ID integer
A team has at least one player, and a player plays for exactly one team.
A team has exactly one manager, and a manager manages exactly one team.
Every player has a number and a position. For example, Pittsburgh Steelers player Ben Roetblisberger has the number and his position is 'quarterback'.
For managers, we record the dollar amount of their annual bonus.
Both players and managers are types of employees.
For each employee, we store a name, salary, and unique employee ID integer
Given this description of the database and its constraints, create the mostly correct EntityRelationship Diagram.
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