Hello, Attached is a DBMS questions and a solution. 

The file "a-Film-Showing-Solution" is the answers to the question "Film_Showings(1)"

"Film_Showing_Policy_change" is the second question that needs to be answered using the help of the others.

Can someone please help. 

 

 

A solution to the Film Showings problem (not necessary the only solution) Verify for yourself that this solution handles all requirements A-K of the problem. DIRECTOR ( Director(K) )
ACTOR ( Actor(K) )
FILM ( Movie-name(K), Review, Rating )
PRICE ( ( Date, Time, Theatre )(K), Adult-Price, Child-Price,
Student-Price, Senior-Price )
SHOWING ( ( Date, Time, Theatre, Screen# )(K), Adult-Count,
Child-Count, Student-Count, Senior-Count )
THEATRE ( Theatre(K), Number-of-Screens, Address, Phone )
TOWN ( Town(K) )
contains:
directs:
stars-in:
shown-at:
price-for:
shows:
charges: TOWN 1:M THEATRE
DIRECTOR 1:M FILM
ACTOR M:N FILM
FILM M:N SHOWING
PRICE 1:M SHOWING
THEATRE 1:M SHOWING
THEATRE 1:M PRICE

Film Showings
The Cinema Guild Theatre Group wants the following collection of 21 data items to be implemented in a database
to manage its member theatres in several towns. Provide the 3NF LDM that satisfies these requirements.
Your answer must be the minimum required for a valid logical model solution. No extraneous entities or
relationships. Do not add *any* data items to the 21 items shown. You must label with a name each entity and
each relationship (between entities). Check carefully that you have satisfied all constraints A through K. Actor
Address_of_Theatre
Adult_Count
Adult_Price
Child_Count
Child_Price
Date
Director Movie_Name
Movie_Rating
Movie_Review
Number_of_Screens
Screen_Number
Senior_Count
Senior_Price
Student_Count Student_Price
Theatre_Name
Theatre_Phone_Number
Time_of_Showing
Town The following describe key business rules, definitions, requirements and relationships between data items:
A: Theatres can show a "double bill" (2 films for 1 admission price) or a "triple bill" (3 films) or a "festival" (a
larger number of films for one price).
B: The film distributor requires each theatre to report the count of each type of ticket sold by showing. A
showing is one start of a movie on a particular day at a specific time. Movies shown together (double bill, etc.)
have one start time.
C: A given movie may be showing at more than one theatre at the same time.
D: The movie review is a short paragraph quoted from a national magazine. The movie's rating is also based on
non-local information.
E: The database needs to track all principal actors in a movie, e.g. co-stars Bette Middler and Carrie Fisher.
F: Theatres sometimes run film festivals, where they show several films starring the same actor. (Don't handle the
festival separately, just be sure that your design for individual movies handles it.)
G: Theatres have four classes of admission with separate prices: adults, students, children, and senior citizens.
H: All prices are determined by the time of day and the day of the week (i.e. the date). Therefore, weekend and
holiday prices can be different than weekday prices. Prices can be different in each theatres showing the same
film at the same time.
I: A theatre is in only one town, but a town can have more than one theatre.
J: Most of the theatres in the theatre group have become multi-screen centers, as specified by the "Number of
Screens" data item for each theatre. For each showing, the screen number must be recorded to identify the actual
room in which the screening will occur. Date and time alone do not uniquely identify a showing.
K: Assume that a movie has only one director, but that director film festivals can be held (e.g. showing five
Alfred Hitchcock or Woody Allen movies).
© 2014 E.Chikofsky page 1

Film Showings - Policy Change: The management of the Cinema Guild Theatre Group has just approved two major changes in policy: (a)
To compete with cable TV, video rentals, and internet distribution, the theatre group has
implemented a radical (courageous? daring? risky?) pricing policy. Under this new policy, the price
paid in all theatres of group for each class of admission is fixed for the time of day.
(For example, admission for adults is always $5.50 for showings before noon.)
It does *not* change for weekends or holidays.
The table of prices is to be stored in the database. Since the prices are for a time range, not for a
single time, management has decided to add two data items: "From-Time" and "To-Time".
The prices charged for a showing will be decided by which time range the start time of that showing
falls within. So, a double-feature showing that starts at 11:30 AM will be charged the prices from the
8:00AM to 11:59AM range, even though its second film will be shown in a later time range (afternoon). (b)
Under the new agreement with the projectionists' (people who run the film projectors) union,
a report will have to be produced each month that shows which showings each projectionist was
responsible for. It must also show the identity (title), approximate start time, duration, and order of each
film shown in that showing. ("Order" means which film was shown first, which one second, etc.; the
only film in a single-bill will have order as 1.) This will allow the union to verify work schedules and
overtime payments.
To accomplish this, management has decided to add three data items: "Duration", "Projectionist",
and "Order-in-Showing". The configuration of each theatre allows a projectionist to handle more than
one screen room at the same time (i.e. more than one showing).
[Note that it is not necessary to store the start time of each separate film in a showing. The start
time of the showing, plus the order and duration of each film, allows the approximate film start times to
be calculated when the report is generated.] Begin with the published solution to the Film Showings problem.
Given these policy changes (and only these changes), make the necessary revisions and
show your new 3NF model.
(Create one model covering all of the original requirements and both policy changes (a) and (b).)

• 1493445697-a-Film-Showing-solution.pdf
• 1493445697-Film_Showings_Policy_Change.pdf
• 1493445697-Film_Showings 1.pdf

ComputerScienceExpert

(11)

Status NEW Posted 29 Apr 2017 05:04 AM My Price 12.00

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file 1493445698-Solutions file 2.docx preview (51 words )

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