Question
SQL The database you will use for this assignment contains information related to Major League Baseball (MLB) about players, teams, and games. The relations are:
SQL
The database you will use for this assignment contains information related to Major League Baseball (MLB) about players, teams, and games. The relations are:
Players(playerID, playerName, team, position, birthYear)
playerID is a player identifier used in MLB, and all players throughout the history of baseball have a unique ID
playerName is players name
team is the name of the MLB team the player is currently playing on (or the last team the player played for if they are not currently playing)
position is the position of the player
birthYear is the year that player was born
Teams(teamID, teamName, home, leagueName)
teamID is a unique ID internal to MLB.
teamName is the name of the team
home is the home city of the team
leagueName is the league the team is in, i.e. either National or American, which stands for National League and American League, respectively
Games(gameID, homeTeamID, guestTeamID, date)
gameID is a unique ID used internally in MLB
homeTeamID is the ID of the hometeam
guestTeamID is the ID of the visiting team
date is the date of the game.
A sample instance of this database is given at the end of this homework handout. Since it is just one instance of the database designed to give you some intuition, you should not customize your answer to work only with this instance.
1. Write appropriate SQL DDL statements (CREATE statements) for declaring the above described relational database schema. Specify the keys and referential triggered actions.
Players
playerID | playerName | team | position | birthYear |
1 | Javy Lopez | Braves | Catcher | 1970 |
2 | Cliff Lee | Phillies | Pitcher | 1978 |
3 | Derek Jeter | Yankees | Infielder | 1974 |
4 | Skip Schumaker | Cardinals | Infielder | 1980 |
5 | Dominic Brown | Phillies | Outfielder | 1987 |
Teams
teamID | teamName | home | leagueName |
1 | Phillies | Philadelphia | National |
2 | Braves | Atlanta | National |
3 | Yankees | New York | American |
4 | Twins | Minnesota | American |
5 | Rangers | Texas | American |
6 | Cubs | Chicago | National |
Games
gameID | homeTeamID | guestTeamID | date |
1 | 3 | 6 | 04/21/2010 |
2 | 1 | 4 | 04/21/2010 |
3 | 2 | 5 | 04/30/2010 |
4 | 6 | 3 | 05/02/2010 |
5 | 4 | 5 | 05/02/2010 |
6 | 1 | 5 | 05/06/2010 |
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