Consider a MAIL_ORDER database in which employees take orders for parts from customers. The data requirements are summarized as follows
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Consider a MAIL_ORDER
for parts from customers. The data requirements are summarized as
follows:
o The mail order company has employees, each identified by a
unique employee number, first and last name, and Zip Code. o Each customer of the company is identified by a unique
customer num, first and last name, and Zip Code. o Each part is identified by a unique part number, a part name,
price, and quantity.
o Each order placed by a customer is taken by an employee and
is given a unique order number. Each order contains specified
quantities of one or more parts. Each order has a date of
receipt as well as an expected ship date. The actual ship date is
also recorded.
Design an Entity-Relationship diagram for the above environment.
Please indicate Cardinality Constraints and Participation Constraints
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- Consider a MAIL_ORDER database in which employees take orders for parts from customers. The data requirements are summarized as follows: o The mail order company has employees, each identified by a unique employee number, first and last name, and Zip Code. o Each customer of the company is identified by a unique customer num, first and last name, and Zip Code. o Each part is identified by a unique part number, a part name, price, and quantity. o Each order placed by a customer is taken by an employee and is given a unique order number. Each order contains specified quantities of one or more parts. Each order has a date of receipt as well as an expected ship date. The actual ship date is also recorded. Design an Entity-Relationship diagram for the above environment.Suppose we have a database for an university. The requirements are as follows: • Professors have an SSN, a name, an age, a rank, and a research specialty. • Projects have a project number, a sponsor name (e.g., NSF), a starting date, an ending date, and a budget. • Graduate students have an SSN, a name, an age, and a degree program (e.g., M.S. or Ph.D.). • Each project is managed by one professor (known as the project’s principal investigator). • Each project is worked on by one or more professors (known as the project’s co-investigators). • Professors can manage and/or work on multiple projects. • Each project is worked on by one or more graduate students (known as the project’s research assistants). • When graduate students work on a project, a professor must supervise their work on the project. Graduate students can work on multiple projects, in which case they will have a (potentially different) supervisor for each one. The FDs for the above requirements are given as, • PSSN →…Suppose we have a relational database with five tables. table key Attributes S(sid, A) Sid T(tid, B) Tid U(uid, C) Uid R(sid, tid, D) sid, tid Q(tid, uid, E) tid, uid Here R implements a many-to-many relationship between the entities implemented with tables S and T, and Q implements a many-to-many relationship between the entities implemented with tables T and U. A. Write an SQL query that returns all records of the form sid, uid where sid is the key of an S- record and uid is the key of a U-record and these two records are related through the relations R and Q. Use SELECT and not SELECT DISTINCT in your query. B. Write an SQL query that returns records of the form A, C where the A-value is from an S- record and the C-value is from a U-record and these two records are related through the relations R and Q. Use SELECT and not SELECT DISTINCT in your query. C. Could one of your queries from parts (a) and (b) return more records than the other? If so, which one? Justify your answer. D.…
- Suppose we have a relational database with five tables. table key Attributes S(sid, A) Sid T(tid, B) Tid U(uid, C) Uid R(sid, tid, D) sid, tid Q(tid, uid, E) tid, uid Here R implements a many-to-many relationship between the entities implemented with tables S and T, and Q implements a many-to-many relationship between the entities implemented with tables T and U. A. Write an SQL query that returns all records of the form sid, uid where sid is the key of an Srecord and uid is the key of a U-record and these two records are related through the relations R and Q. Use SELECT and not SELECT DISTINCT in your query. B. Write an SQL query that returns records of the form A, C where the A-value is from an Srecord and the C-value is from a U-record and these two records are related through the relations R and Q. Use SELECT and not SELECT DISTINCT in your query. C. Could one of your queries from parts (a) and (b) return…Suppose we want to develop a browser-based training system to help people prepare for such a certification exam. A user can request a quiz for the system. The system picks a set of questions from its database, and compose them together to make a quiz. It rates the user’s answers, and gives hints if the user requests it. In addition to users, we also have tutors who provide questions and hints. And also examinators who must certify questions. List down the functional requirements of the above said system? Use Form based method for specifying “Make Quiz” functional requirementconsider a Scenario: A client wants a database for Order entry at his Shop, database contain information about customers, items, and orders. The following information is to be included. For each customer: (Customer number (unique), Valid shipping/delivery addresses (several per customer), Balance, Credit limit, Discount) - For each order: (customer number, ship-to/delivery address, date of order. Detail lines (several per order), each giving item number, quantity ordered - For each item: Item number (unique), Quantity on hand at each warehouse Item description Design a ER-Diagram (on paper or in MS word) from this above mentioned data. ERD must contain relation degree/constraints.
- Suppose you are given the following requirements for a simple database for the Indian Premier League (IPL): a. the IPL has many teams, b. each team has a name, a city, a coach, a captain, and a set of players, c. each player belongs to only one team, d. each player has a name, a position (batting order), a skill level (such as batsman, bowler, AL rounder), and a set of injury records,e. a team captain is also a player, Construct a clean and concise ER diagram for the IPL database.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 setof injury records,- a team captain is also a player,- a game is played between two teams (referred to as host_team and guest_team) andhas 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.Suppose that you are a manufacturer of product ABC, which is composed of parts A, B, and C. Each time a new product ABC is created, it must be added to the product inventory, using the PROD_QOH in a table named PRODUCT. Also, each time the product is created, the parts inventory, using PART_QOH in a table named PART, must be reduced by one each of parts A, B, and C. The sample database contents are shown in Table P10.1. Given the preceding information, answer Questions a through e. How many database requests can you identify for an inventory update for both PRODUCT and PART? Using SQL, write each database request you identified in Step a. Write the complete transaction(s). Write the transaction log, using Table 10.1 as your template. Using the transaction log you created in Step d, trace its use in database recovery.
- Suppose that you are a manufacturer of product ABC, which is composed of parts A, B, and C. Each time a new product ABC is created, it must be added to the product inventory, using the PROD_QOH in a table named PRODUCT. Also, each time the product is created, the parts inventory, using PART_QOH in a table named PART, must be reduced by one each of parts A, B, and C. The sample database contents are shown in Table P10.1.Given the preceding information, answer Questions a through e.a. How many database requests can you identify for an inventory update for both PRODUCT and PART?b. Using SQL, write each database request you identified in Step a.c. Write the complete transaction(s).d. Write the transaction log, using Table 10.1 as your template.e. Using the transaction log you created in Step d, trace its use in database recovery.Consider a MOVIE database in which data is recorded about the movie industry. The data requirements are summarized as follows: -- Each movie is identified by title and year of release. Each movie has a length in minutes and a rating (e.g., G, PG, or R). Each has a production company, and each is classified under one or more genres(such as horror, action, drama, and so forth). Each movie has one or more directors and one or more actors appear in it. Each movie also has a plot outline. Finally, each movie has zero or more quotable quotes, each of which is spoken by a particular actor appearing in the movie. An actor may have multiple quotes from one movie. -- Actors are identified by name and date of birth and appear in one or more movies. Each actor has a role in the movie, i.e., the character he or she plays. -- Directors are also identified by name and date of birth and direct one or more movies. -- Production companies are identified by name and each has an address. A production…Q. Suppose we want to develop a browser-based training system to help people prepare for such a certification exam. A user can request a quiz for the system. The system picks a set of questions from its database, and compose them together to make a quiz. It rates the user’s answers, and gives hints if the user requests it. In addition to users, we also have tutors who provide questions and hints. And also examiners who must certify questions. List down the functional requirements of the above said system? Use Form based method for specifying “Make Quiz” functional requirement.