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Exercise 1:
Write a CHECK constraint that expresses the following condition on attribute Rating in table Movies in Movie Database: "Any possible value of Rating is either a null value or a number in the interval from 0 to 10 inclusively".
Exercise 2:
Write a CHECK constraint that expresses the following condition on records in table Laptop in Hardware Database: "If the screen is larger than 20, then the price is higher than 2000".
Exercise 3:
Write a CHECK constraint that expresses the following condition on table Schedule in University Database: "Each course (occurring in this table) is offered at least two times". Hint: Use NOT EXISTS.
Exercise 4:
Write a CHECK constraint that expresses the following condition on table StarsIn in Movie Database: "Each movie (occurring in this table) has at most one director". Hint: Use NOT EXISTS.
Create ERD containing Order and Customer entity types connected by 1-M relationship from Customer to Order. Select suiatble relationship name using your common knowledge of intersection.
Write a PROLOG program that implements a family database for your family. Save it as an ordinary text file named family.pro. Your program should implement the following facts for your immediate family, grandparents, and great-grandparents.
Write a function 'Max' that takes an int array and the size of the array as input and returns the largest element of the array. The function should look like the following.
relational algebragiven the following set of relations from the east coast aquarium database list the sequence of
If a bounded amount of stable storage is used for the log, how can we always ensure enough stable storage to hold all log recordswritten during restart?
Populate your database with at least 3 rows of data and import your IDEF1X diagram into Oracle and create the appropriate tables and relationships.
What is a data model and what is it purpose and what is a prototype and what is its purpose - What is a use case, and what is its purpose?
assignmentwrite a assignment to study and modify the postgresql source code with a focus on one of the core modules -
describe the challenges that an organization will face when changing business processes and how information systems
Please briefly explain whether the following schedule has a deadlock. Your grade depends on both your answer and explanation and please briefly explain which transactions satisfy two-phase locking protocol and which don't.
To analyse and comprehend a provided ER diagram and Database Schema and to implement a database based on the provided ER diagram and Database Schema To write required SQL statements to query the database
Mark the following words in the document as index entries: behavior (four instances), favorable (five instances), and impression (eight instances).
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