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Cardinality shows the number of instances of an entity associated with another entity participating in a relationship. Depend on the cardinality binary relationship can be further dividing into the following categories:
Example: Relationship between university/college and principal
One college only have at the most one principal and one principal can be assigned to only one college.
Likewise we can define the relationship among Vice Chancellor and university.
sy bcs project of hospital managment system
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
education.
Extend your CREATE TABLE statement from problem 3 with referential integrity constraints. Updates and deletes on related rows are restricted. 6. From examination of the sample data
What is meant by heuristic optimisation?Discuss the major heuristics that are applied during query optimisation.
What is relationship instance ? Relationship Instance - A relationship is a relation between two or more entities. An instance of relationship set is a set of relationships.
What are the purpose for having variable length records? What kinds of separator characters are required for each? Variable-Length Records - Variable-length records are thos
Section A: Use the following tables to create a database called College. Use SQL commands. Student stuid(primary) lastName firstName
Write short notes on domain relational calculus The domain relational calculus uses domain variables that take on values from an attribute domain rather than values for whole
PRINCIPLES OF DATABASE 1. State the following terms: a) Database b) Database Management System c) Entity d) Attribute e) Relationship 2. Discuss the Three Level Architecture
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