C- Will always be allowed.
In the given condition the deleting a record in relation T will always be allowed. So the correct option is Option C
If there is a one-to-many relationship between two entities, S (on the "one side" of the...
Question 29 What entity type is used to convert a many-to-many relationship to two one-to-many relationships? repeating entity intersection entity associative entity attributive entity Question 30 A many-to-many relationship can be directly modeled in a relational database such as Microsoft Access. True False Question 31 Which order is correct for the designer to normalize a data structure? I. Remove all repeating groups and identify the primary key. II. Remove any transitive dependencies. III. Remove all partial dependencies and place them...
QUESTION 1 What is the most common relationship within a relational database? Select the best answer from the following. One-To-One relationship. o One-To-Many relationship. Many-To-Many relationship. Zero-To-Zero relationship. QUESTION 2 What is an "entity'? Select the best answer from the following. An entity, for our purposes, is the same as a table in the database. An entity represents one of the columns in an individual table. There are no entities in a relational database. Entities are only part of NoSQL...
Question 4 To represent a one-to-many relationship in a relational database design, _____. Group of answer choices the key of the child is placed as a foreign key into the parent the key of the parent is placed as a foreign key into the child an intersection table must be created the key of the table on the "many" side is placed in the table on the "one" side the keys of both tables are joined into a composite key...
How would you represent a one-to-many strong entity relationship in a physical relational database design?
37. Entity-Relationship diagram is developed in _________________. A. Conceptual Data Model B. Logistical Database Design C. Physical Database Design D. Implementation 38. Which of the following database models only expresses a 1:M relationship? A. Hierarchical model B. Relational model C. Objected-oriented model D. Network model 39. The subtype discriminator is a simple attribute when there is a(n): A. overlap rule B. disjoint rule C. no specialization D. None of the above 40. ...
If two tables have a many-to-many relationship, you need to define a/an _____________ table that relates their records. 10 points Question 2 The most common type of relationship between two tables is called a/an _______________ relationship. 10 points Question 3 The rows in a table are kept in the sequence that’s based on its __________________________ index. 10 points Question 4 To maintain _________________________________, if you delete a row in a primary key table, you must also delete any related rows...
An REA diagram depicts the following agent entities: purchasing agent, receiving dock employee, cashier, inventory custodian, and suppliers. How many tables are needed to represent this REA diagram in a relational database? A. One B. Two C. Three D. Four E. Five
For this DATABASE homework assignment you will create an Entity Relationship model for a business case and then convert the model to a set of relations. Read through the following business case for the “Drum Corps International” Create an Entity relationship model with the necessary entities, attributes, identifiers and relationships to capture the data requirements. All relationships should be labeled with verb phrases. Use UML notation for this work. Relationship lines should not cross. ...
Consider the following relations for course-enrollment database in a university: STUDENT(S-ID,S-Name, Department, Birth-date) COURSE(C-ID, C-Name, Department) ENROLL(S-ID, C-ID, Grade) TEXTBOOK(B-ISBN, B-Title, Publisher, Author) BOOK-ADOPTION(C-ID, B-ISBN) (a) Draw the database relational schema and show the primary keys and referential integrity constraints on the schema. (b) How many superkeys does the relation TEXTBOOK have? List ALL of them. (c) Now assume each COURSE has distinct C-Name. (i) If C-ID is a primary key, what are the candidate keys and the unique keys...
6. With respect to database systems, which of the following statement(s) is (are) true? a. The physical view of data is how people conceptually organize and understand the relationships among data items. b. The DML builds the data dictionary, creates the database, describes logical views for each user, and specifies security constraints. c. A record layout shows the items stored in a file, including the type of data stored and both the order and length of the data fields. d....