Suppose you are given the following requirements for a simple database for the National Hockey League (NHL): - the NHL has many teams, - each team has a name, a city, a coach, a captain, and a set of players, - each player belongs to only one team, - each player has a name, a position (such as left wing or goalie), a skill level, and a set of injury records, - a team captain is also a player, - a game is played between two teams (referred to as host_team and guest_team) and has a date (such as May 11th, 2017) and a score (such as 4 to 2). Construct the ER diagram for the NHL database using the Crows Foot notation.

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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.