Warner and his brothers operate a cinema chain (Warner and Brothers Movies). He wants to build a database to use for forecasting demand for both the movies he shows and the food he sells as well as to track other critical information for his business.

He tells you he has several cinemas and each cinema has between 1 and 15 theaters. Each cinema has a location (address), a unique name and a phone number. The theaters vary in terms of seating style, type of sound equipment and seating capacity.

Movies are shown throughout the day starting at 11 am and finishing at 1 am. Some movies will the shown in multiple theaters and over time may switch theatres that they show in. For instance, Star Wars may originally be shown in the 3 largest theatres in a cinema but after 3 months it may be showing in just one of the smaller theaters. Of course, each theater is also used for a variety of movies over time.

Warner is interested in knowing how many people, classified by adults and children, attend each showing of a movie. A showing would be a specific run of a specific movie, for instance, Mission Impossible II at 11 am on Saturday Oct 28th in theater 3 at WB Cinemas. To estimate approximate ticket sales each showing is given a price code that describes the cost of children and adult tickets. For instance, morning weekend prices are $10 for adults and $7.50 for children.

Besides the name of each movie, the length of the movie, the type of recording (Dolby surround sound, Dolby DTS, subtitles, etc.), and the rating of the movie are recorded in the database. Warner also wants to record any awards the movie has won (e.g. Oscar for best picture, 1997, etc.).

Each cinema has a manager and several other employees. Most employees are trained by another employee when they are hired. Warner needs to know the name, address, Social Security Number and phone number for all of his employees. He also wants to be certain he knows who the manager is of what cinema, who trained each employee, and at which cinema each employee works. No employee works at more than one cinema and some employees do not work at a cinema at all (i.e. the IS department). All cinemas have one and only one manager.

In order to track food receipts Warner has the manager at each cinema enter in the total receipts each cinema makes for beverages, popcorn and candy at the end of every day (their cash registers are not automated or linked to the database yet).

Hints:

Price code: When you think about price codes for a movie theater here is how to think of it. Lets say there are 5 price codes (matinee, twilight, regular, late night, and morning) that the manager can use. So, the matinee price code they may typically use for movies that run any time from 2-4:30, and regular price code may be used most frequently for shows that run between 6:30-10:30, etc. For matinee movies kids tickets are 2.50 and adult tickets are 4.50, for regular movies kids tickets at 5.50 and adult tickets at 9.50. Sometimes a manger may decide to use regular pricing for movies that run at different times than the typically considered regular pricing times and that is just fine! For instance, when Men in Black came out all movie times for this movie were priced with regular pricing (i.e. there were no price breaks given in the first week).

Register receipts: It makes no difference who enters the receipts for the day into your database, all you care about knowing is (for example) that on Sept 26th you had $50 in popcorn receipts, $24 in candy, and $100 in beverage receipts for Circle Cinema. And on Sept 27th you had $55 in popcorn receipts, $64 in candy, and $500 in beverage receipts for Circle Cinema. And on Sept 26th you had $150 in popcorn receipts, $214 in candy, and $190 in beverage receipts for Beer and a Movie Cinema. And on Sept 27th you had $95 in popcorn receipts, $94 in candy, and $900 in beverage receipts for Beer and a Movie Cinema.

Requirements:

Build the conceptual model for the Warner and Brothers Movies database represented as an Entity Relationship Diagram showing entities, relationships, minimum and maximum cardinalities, identifiers and at least two attributes for each entity (including entitys identifier) (YOU CAN DRAW IT OUT)

Add associative entities (see definition in slides and textbook) when needed identifying their relevant attributes; use a minimum of two attributes per each associative entity