Which one of the following criteria is applied to make sure values are defined and used appropriately? O Def use values O Producer consumer criteria Variable value criteria Data flow criteria
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Q: ynami
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- Using the company schema, when creating the "works_on" table, the foreign key should be specified as: foreign key (pno) foreign key (essn) foreign key (essn, pno) references employee (ssn) and project(pnumber) foreign key (essn) references employee(ssn), foreign key (pno) references project(pnumber)What considerations should be taken into account when deciding on the data type for an attribute?A college course may have one or more scheduled sections or may not have a scheduled section. Attributes of COURSE include Course ID, Course Name, and Units. Attributes of SECTION include Section Number and Semester ID. Semester ID is composed of two parts: Semester and Year. Section Number is an integer (such as 1 or 2) that distinguishes one section from another for the same course but does not uniquely identify a section. How did you model SECTION? Why did you choose this way versus alternative ways to model SECTION?
- Which of the following types of relationships can have attributes associated with them: one-to-one, one-to-many, many-to-many?What variables influence relationships, and how do they function?The value range of an attribute must be large enough for the index to be relevant. Except for this one use case, an index is never helpful.
- Describe a feature that is found in Design View but not in the Datasheet View. Describe two situations where you might use this feature.Q : Draw an ERD from the following business rules: Use proper notations for the type of attributes. A software system is to be developed for an educational institute. The software is intended to be used by faculty members, students and designated support staff. System administrator will also use system for system administration and management. Student’s data including names, registration number, cell numbers and address will be added and edited by Clerk. The data will be added at the time of student reporting at campus. Student can enroll into any course of their choice from the offered courses. They can also request for dropping a course. Approval of course dropping of a student will be granted or refused by academic coordinators.Table: Task Primary key: TaskID Foreign key: Team MemberID TaskID 1 2 3 Description Build login screen Implement inventory management Add logo to splahs 1 screen Duration StartDate 2022-05-06 4 10 TeamMemberID 2 1 2022-05-15 1 2022-05-06 2 Write a SQL statement that will add the below row to the Task table. TaskID Description Duration StartDate Team MemberID 3 4 Implement 2022-05-07 email notifications Write a SQL statement that will change the value of the Task description with ID 3 to "Add logo to splash screen".
- Write the resulting relations based on the following ER diagram Like_Group N Customer N name N name address Group Like_Artist amoun t N name Classify Artist year N birthplace 1 title style age type Artwork N Paints priceGive some specific guidelines for defining attributes?Query design by referring the following scenario.Scenariocompany has a huge database to handle their employees’ details.Most of the details regarding the employee activities and department details are stored in Employeestable and Departments table. Write the appropriate query to support the manager to complete thefollowing: