Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Which of the following defines a relationship in which each occurrence of data in one entity is represented by only one occurrence of data in the other entity?
a. one-to-one
b. one-to-many
c. many-to-many
d. none of the above
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- Please help am struggling. Thank you 1. Which of the following is not used to change a COLUMN in an TABLE? a. ADD b. MODIFY c. DELETE d. DROP Which of the following statements best defines cardinality? a. Cardinality expresses the maximum number of entity occurrences associated with one occurrence of the related entity. b. Cardinality expresses the minimum number of entity occurrences associated with one occurrence of the related entity. c. Cardinality expresses the minimum and maximum number of entity occurrences associated with one occurrence of the related entity. d. Cardinality expresses number of entity occurrences associated with one occurrence of the related entity.arrow_forwardPrimary key identifies a unique tuple of a relation, true or false?arrow_forwardPlease help with the following: What concept is defined by the following definition? ”A set of entities of the same type that share the same properties and attributes.” Select one: a. All of the above b. Relation c. Entity set d. Relationship setarrow_forward
- T. Relational Model Instructions This assignment will show that you understand how columns should be separated between tables in a properly structured relational database. Your objective: Imagine you need to design a database that tracks members, type of membership, and exercise routines for each member. • Build a relational database model with multiple tables • Use your imagination and feel free to create the tables with as many columns as you would like. • Highest points will be awarded for completeness AND correctness. Submit as an Excel workbook or image.arrow_forwardWhich relational process describes a binary relationship? Multiple occurrences of an entity type are bound together by intersection data. A single occurrence of one entity type is associated with intersection data. A single occurrence of one entity type is associated with a single occurrence of another entity type. Multiple occurrences of an entity type are associated with multiple occurrences of another entity typearrow_forwardWhat does the term "relationship" mean? What are the qualities of a relation defined as?arrow_forward
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