It is an abstraction through which relationships are treated as higher level entities a. Generalization b. Specialization c. Aggregation d. Inheritance 5. The operation which is not considered a basic operation of relational algebra is a. Join b. Selection c. Union d. Cross product
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- Objective: To create a JSON for Scheme details with objects Scenario: Government wants to create a database for schemes launched in respective country. Application sends the details of schemes in the form of JSON Help to create a JSON with the information provided. Name Datatype of value Scheme String MinistryDetails Object LaunchedYear Number Country String BudgetInCrores Number MinistryDetails- Object : Name Datatype of value Ministry String MinisterName String HeadOfMinister StringDraw the shape used in the object-based logical model of the following. a. Attributes b. Entity sets c. Links d. RelationshipsWhat is the difference between a weak and a strong group of entities?
- TRUE or FALSE - Generalization (is-a) is the relationship established between entities to show that sub-entities that are derived from the generalized entity. Select one: a. TRUE b.FALSE173. The graphical representation of database description is called a. dynamic schema diagram b. schema diagram c. structure diagram d. entity path diagramWhich of the following statements are true in the nursing home conceptual design as depicted by the EER diagram of the document above: Group of answer choices 1. Day Care and Resident have been conceptualised as disjoint Subclass Entity Sets of a more general class Patient 2. All entities known as Resident appear to have a specific relationship not applicable to Day Care entities 3. All entities known to the database as Patient must be classified either as Day Care or as Resident, or both. 4. All entities known to the database as Patient must be classified either as Day Care or as Resident
- Random Hospital Example ERD Problem Follow the Simple Procedure for ERD diagramming to design an ERD using the following user provided information. Remember the ERD will eventually turn into the design for a database from a top down view. Make sure you resolve any many to many conflicts. Label an identifier or primary key and all pertinent attributes given. If an attribute is not readily apparent from the user information, then make one up that makes sense for the particular entity. Therefore, all entities should end up with at least an identifier and another attribute that makes sense. You may use any of the approaches shown by the book, though the ER-Model and Crow’s foot are the most common. Make sure you show entities, relationships, cardinality, and optionality. Random Hospital Example A hospital has 10 wards, each containing up to 20 patients. Patients have only one doctor allowed to prescribe drugs for them. Doctors do their rounds once a day and prescribe drugs by…Databases: Regular entity type is transformed to a relation.Computer Science Design an OO schema for a database application that you are interested in.Construct an EER schema for the application, and then create the corresponding classes in ODL. Specify a number of methods for each class, andthen specify queries in OQL for your database application.
- QUESTION 2: Design and implement design pattern that can be used to create a counter to provide unique sequential numbers, such as might be required for use as primary keys in a database. Based on the given basic information: • Draw appropriate class diagram? • Implement your class diagram in java?Introduction to database systems Question: Create an ER diagram relational schema and queries of a charity donation application that has classes as follows: Donor(name, address, mobile number, email) with subclasses: DonateMoney(name, amount, card number,security code) and DonateOther(item, name, address, mobile number, email), Volunteer(name, address, mobile number, email) and Organization(name, address, mobile number, email). The description of the application is as follows: the user can either donate money or donate other such as food, clothes,books, etc where he/she will have to first select the organization he/she is willing to donate to and then fill in the required information. The user could also volunteer by selecting what organization he/she wants to volunteer to and filling in the required information.Doctors have id. name. date of birth. and specialty. Patients have id. name, and date of birth. and address. Medicines have name. patent number, and milligrams We want to build A database that keeps track of the medicines prescribed by a doctor to patients The prescription process happens in a hospital. (a) Draw a complete Entity-Relationship diagram for the description above. You must include all the details, such as keys, weak entities (if any). cardinality constraints., etc Your diagram must use n-ary relationships You must use arrow notation Your diagram must avoid redundancy.