Consider a database of King Abdulaziz Airport. For this mini-world example, define four mini-world entities and four mini-world relationships.
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- Consider a database that includes the entity sets student, course, and sectionfrom the university schema and that additionally records the marks that studentsreceive in different exams of different sections. Construct an alternative E-R diagram that uses only a binary relationship between student and section. Make sure that only one relationship exists between a particular student and section pair, yet you can represent the marks that a student gets in different exams.Consider a database used to record the marks that students get in different exams of different course offerings. Construct an E-R diagram that models exams as entities, and uses a ternary relationship, for the above database.Consider a database that includes the entity sets student, course, and sectionfrom the university schema and that additionally records the marks that studentsreceive in different exams of different sections. Construct an E-R diagram that models exams as entities and uses a ternary relationship as part of the design.
- Consider a database used to record the marks that students get in different exams ofdifferent course offerings (sections). Construct an E-R diagram that models exams as entities, anduses a ternary relationship, for the databaseDraw The following ER Model: Consider a university database for the scheduling of classrooms for final exams. This database could be modeled as the single entity set exam, with attributes course-name, section-number, room-number, and time. Alternatively, one or more additional entity sets could be defined, along with relationship sets to replace some of the attributes of the exam entity set, as • course with attributes name, department, and c- number • section with attributes s-number and enrollment, and dependent as a weak entity set on course • room with attributes r-number, capacity, and building a) Show an E-R diagram illustrating the use of all three additional entity sets listed. b) Explain what application characteristics would influence a decision to include or not to include each of the additional entity sets.Consider an online auction database system in which members (buyers and sellers) participate in the sale of items. The data requirements for this system are summarized as follows: Members The online site has members who are identified by a unique member id and are described by an email address, their name, a password, their home address, and a phone number. Supertype and Subtypes for Members A member may be a buyer or a seller, but not both (disjoint subtype). A member must be one or the other (mandatory or required participation). A buyer has a shipping address recorded in the database. A seller has a bank account number and routing number recorded in the database. Both buyer and seller subtypes (entities) share the primary key with members which is membered. Items Items are placed by a seller for sale and are identified by a unique item number assigned by the system. Items are also described by an item title, an item description, a starting bid price, bidding increment, the start…
- Construct an ER Diagram from the following case study A new established company database needs to store information about employees (identified by NIC, with salary and phone as attributes), departments (identified by dno, with dname and budget as attributes), and children of employees (with name and age as attributes). Employees work in departments; each department is managed by an employee; a child must be identified uniquely by name when the parent (who is an employee; assume that only one parent works for the company) is known. We are not interested in information about a child once the parent leaves the company.Create a simple database diagram (detailed) for a Pakistan Super League (PSL). 1. The PSL has many teams2. Each team has a name, a city, a coach, a captain, and a set of players3. Each player belongs to only one team4. Each player has a name, a position (Opener, Middle Order, Tail Ender), a skill level (Expert Batsman, All Rounder, Expert Bowler), and a set of injury records.5. A team captain is also a player.6. A game is played between two teams (referred as host team and guest team) and has a date and a score (such as 156 to 142).A weak entity set may always be made stronger by adding the primary-key attributes of its identifying entity set to its attributes. Give an example of the kind of redundancy that will come from our choices.
- There are many dietitians in the center. There are also many clients in the center. A dietitian gives a menu to a client every week. Many diet menus are available. A diet menu consists of many food items and each food items belongs to one food category. • Identify the relationship between Entities (clearly showing the cardinality and participation) The question is very clear slove it according to itConsider a university database for the scheduling of classrooms for -final exams. This database could be modeled as the single entity set exam, with attributes course-name, section number, room-number, and time. Alternatively, one or more additional entity sets could be defined, along with relationship sets to replace some of the attributes of the exam entity set, as 1.course with attributes name, department, and c-number 2. section with attributes s-number and enrollment, and dependent as a weak entity set on course 3. room with attributes r-number, capacity, and building Show an E-R diagram illustrating the use of all three additional entity sets listedA well-structured database starts from an effective Entity Relationship Diagram (ERD). For this part of the question, you will need to sketch an ERD for the following gym scenario: A member must have a member ID, name and contact number, can be enrolled in one or more gym session. A gym session can be enrolled in by one or more members. Each gym session is identified by a session ID, and has a name, date and instructor details (Instructor ID). An instructor has an instructor ID, name and contact number, and must only be assigned to one gym session. A gym session can have one or more instructors assigned in it.” *show entities, relationship types and cardinalities. Crow’s foot model notations recommended.