1. How many entities are there within the entire database? 2. How many attributes are there for each entity? 3. Give at least four (4) constraint within each of the entities.
Q: Explain the differences among external, conceptual, and internal schemas and the reasons for the…
A: The internal schema defines the physical storage structure of the database. The internal schema is a…
Q: List, in alphabetical order, the names of all patients who had consultations after 01 January 2018.…
A: 6.2 Select pt.Pat_Name ,cs.Con_Date FROM patient pt JOIN Consultation cs ON pt.pat_id=cs.pat_id…
Q: A professor teaches many courses in a university. However, some professors who are the…
A: Here the entity we have are Professor Course A professor can teach zero or many course. Therefore…
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A: As we know, in real life transaction is nothing but transfer some money, or some device, or share…
Q: Convert the following ER diagram into a relational database schema, be certain to indicate primary…
A:
Q: Describe an entity, an entity type, and an entity set in a database management system?
A: Entity: The entity is an object, place, or thing which has its independent existence in the real…
Q: What are the names of four properties that should be satisfied for all database transactions? Select…
A: Atomicity: It refers to not only a part but the integrity of the whole database transaction. That…
Q: Convert the following ER diagram into a relational database schema, be certain to indicate primary…
A: Conversion of above ER diagram to relationship schema is in step 2.
Q: cify all the relationships among the records of the database shown in Figure 1.
A: Accprding to question The detailed answer to the above-mentioned question is given below :-
Q: What is part of a database that holds only one type of information? (A) none (B) Field
A: Please find the answer below :
Q: Does compliance with entity and referential integrity mean that a database is dependable, or does it…
A: Entity and referential integrity are two forms of data integrity that are particularly important in…
Q: QUESTION 3 A USE statement is not required when Session is already in the context of the database…
A: - The question wants to know when is the use statement not required. - A use statement is used to…
Q: Does the fact that a database satisfies the requirements for entity and referential integrity…
A: Does the fact that a database satisfies the requirements for entity and referential integrity…
Q: You can use either an E-R diagram or DBDL to represent the structure of a database. Which approach…
A: E-R diagram: - ER diagrams are used to examine existing databases to find and solve problems in…
Q: 1.Use the below diagram to create a database using SQL Server database. Name the database as…
A: We use the "primary key" and "references" (foreign key) concepts here to establish a link between…
Q: If a database is entity and referential integrity compliant, does this suggest that the database is…
A: Data integrity is the act of ensuring the correctness and consistency of data throughout its life.…
Q: QUESTION 4 Convert the following ER diagram into a relational database schema, be certain to…
A: Convert ER diagram into relational database schema.
Q: What exactly is the significance of the database model
A: Here have to determine about database model.
Q: 41.What defines a transitive dependency in a database table
A: 41.Defined a transitive dependency in a database table
Q: . A relational database developer refers to a record as a. a criteria b. a relation c. a tuple d. an…
A: c) a tuple
Q: What are the most crucial physical database design decisions?
A: This question explains about critical choices made throughout the physical database design process.
Q: name ID admit_date SSN address phone Patient responsible Physician Room id {disjoint,complete) 0.2…
A: Below is the relational schema for the above entity relation diagram. The schema contains the name…
Q: List three common scenarios in which relations should be denormalized prior to database…
A: Introduction: A normalised database typically involves combining several tables to get queries;…
Q: Question 48 (1 point) In order to improve the performance of a database used primarily used for…
A: Answer 1: True. Denormalization can improve performance by: Minimizing the need for joins…
Q: The first time when the data is populated into the database, is considered as: [Select all correct…
A: your question is about The first time when the data is populated into the database, is considered…
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A: The relationship between Accident and Car is M:N. Thus we need to create a new table for the…
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A: Denormalisation is process related to the database. The primary requirement to do denormalisation is…
Q: 1- The following figure present BANK ER diagram. Map it into a full relational schema. Specify all…
A: Mapping into full relationship schema and specifing the pk and fk has shown in step2
Q: Convert the following ER diagram into a relational database schema, be certain to indicate primary…
A:
Q: Question 4, Page 281 Concepts of Database Management, 9th Edition ISBN: 978-1-337-09342-2…
A: Problem requirement: The company needs to add an reservations from sports clubs. So, one need to…
Q: When representing the structure of a database, you may use either an E-R diagram or a DBDL. Which…
A: Introduction : Diagram E-R :- ER diagrams are used to analyses existing databases for logic or…
Q: QUESTION 4 Convert the following ER diagram into a relational database schema, be certain to…
A:
Q: You are responsible to help design this database for the hospital. a) What relationship (one-to-one,…
A: Answer a) One to many relationship exists between NURSE and PATIENT. This is because one nurse…
Q: 'What is the integrity constraint concept? When is a database found completely working?
A: This integrity restriction guarantees data continuity and ensures that data precision and quality…
Q: For each table, identify the primary key and the foreign key(s). If a table does not have a foreign…
A: As per our policy, "Since you have asked multiple questions, we will solve the first question for…
Q: . In database schema, the database snapshot is also called a. current set of entity b. current set…
A: A database schema represents the logical configuration of all or part of a relational database. It…
Q: Indicate the changes (using the shorthand representation) that you would need to make the original…
A: Indicate the changes (using the shorthand representation) that you would need to make the original…
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A: When designing this database, the first step will be creating a database using Create Database…
Q: A) Let suppose if you are a database designer, and if you were designing a Web-based System to make…
A: DBMS architecture: There are three levels in DBMS architecture: External level/view level -…
Q: the concept of a business rule and how it relates to database architecture.
A: The concept of a business rule and it relates to database architecture
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- 167. The file organization which allows us to read records that would satisfy the join condition by using one block read is a. Heap file organization b. Sequential file organization c. Clustering file organization d. Hash file organizationAssume one file has r = 10^6 records. Each record takes R = 100 bytes, of which 10 bytes are for the key of record. Suppose the key balues range from 1 to 1,000,000, inclusive. Assume the block size B is 1000 bytes for all files, and that an address (block pointer, tree node poiinter, or data record pointer) takes 10 bytes. How many data block accesses on the average are needed to fetch a record by using linear search?Program in Java: topic: insertion sort The state and variable display: Unsorted Partition Reference Index: 7, Traversing Index: 1, Current Traversing Index Value: avocado, Condition Value Index: 0 Current Condition Value: apple, Swapping Condition: FalseCurrent Array: ['apple', 'avocado', 'orange', 'banana', 'strawberry', 'pineapple', 'plum', 'mango'] The Input must be:["apple", "avocado", "orange", "banana", "strawberry", "pineapple", "plum", "mango"]The assumptions and conditions: Sorted partition is on the right side.The order is increasing alphabetically but the strings that has an odd length should be the first to be sorted then the strings with the even length goes next The result or Output must be:['apple', 'avocado', 'mango', 'pineapple', 'banana', 'orange', 'plum', 'strawberry']
- Assume one file has r = 10^6 records. Each record takes R = 100 bytes, of which 10 bytes are for the key of record. Suppose the key balues range from 1 to 1,000,000, inclusive. Assume the block size B is 1000 bytes for all files, and that an address (block pointer, tree node poiinter, or data record pointer) takes 10 bytes. What is the total number of blocks required by the B+-tree?Write in a word file the solution to the following problem. Problem 1. Suppose the Cook Library, USM has manual book circulation causing long queue, and inefficiency of bookkeeping and poor service. Cook Library has access to students, faculty members and external organization. If the librarian of Cook Library wants to computerize the book circulation: Write by your intuition of abstraction and decomposition as what objects and functions are required to computerize the circulation desk. Problem 2. Write by your intuition of abstraction and decomposition as what objects and functions are required to computerize the student course handling in an online portal like canvas. Problem 3. Choose citation each of journal, book, electronic sources for a research topic of Software Engineering and write those in both APA and MLA format as following Reference (APA format) 1. 2. 3. Reference (MLA format) 1. 2. 3. Problem 4. Find two key researchers of Software Engineering field and…The most important tables in the library information system are the following. Books (bid, author, title, publisher, year); Members (mid, name, surname, address, telephone); Rental (rid, mid, bid, eid, date); Employee (eid, name, surname, address, telephone) All tables are sorted according to the key. The following information is given. 1 page on the disk = 8KB |Books| = 1.000.000 records, 320 bytes, 25 records/page, 40000 pages |Members| = 10.000 records, 200 bytes, 40 records/page, 250 pages |Rental| = 300.000 records, 40 bytes, 200 records/page, 1500 pages |Employee| = 100 records, 200 bytes, 40 records/page, 3 pages We can have 25.000 pages in the buffer. QUESTION 2.1 B+ index is used on the attribute Books.publisher. The size of the record identifier is 8B, the size of the page identifier is 6B. Calculate the size of the B+ index whose pages are filled to their minimum capacity as accurately as possible. Write down all assumptions.
- 186. A data dictionary is created when a __________ created. a. Instance b. Segment c. Database d. DictionaryFill in the following table to differentiate between Contiguous Allocation and Linked Allocation.Question 4 Numpy and PandasA. Why do we want to use Numpy arrays instead of native Python arrays ? B. Explain the difference between view and copy in Numpy. C. Explain broadcasting in Numpy D. Explain Series in Pandas . E. Explain Dataframe in Pandas
- Discuss the time complexity of common operations like insertion, deletion, and retrieval in a dictionary data structure.Which of these describes how an item in a doubly linked data structure is accessed? a.immediately accessed via a base address and offset b.accessed by starting at one end and following the links until the item is reached c.immediately accessed via an index d.accessed via a binary searchI need justify and explain briefly in at least 3 sentences the complexity of each operation in buffer operations in terms of Big O notation of the below code: struct Node { char data; struct Node *next; }; struct Node* head1 = NULL; struct Node* head = NULL; void push(struct Node** head_ref, char new_data) { struct Node* new_node = (struct Node*) malloc(sizeof(struct Node)); new_node->data = new_data; new_node->next = (*head_ref); (*head_ref) = new_node; } void print_list(struct Node* Head) { printf("values are: "); while(Head) { printf("%c ", Head->data); Head = Head->next; } printf("\n"); } bool isEmpty() { return head == NULL; } void pop(struct Node **head_ref, int position) { // If linked list is empty if (*head_ref == NULL) return; // Store head node struct Node* temp = *head_ref; // If head needs to be removed if (position == 0) { *head_ref = temp->next; // Change head…