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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:
From information system point of view, we should take the key functions of organization and map them to strategic information. Do your companies follow this process or are steps skipped?
What actions does a referential integrity constraint prevent from occurring when data is inserted in a table that contains this constraint?
A database is to be created for University to monitor students' progress throughout their course of study. Students are reading for degree (such as BTech, BTech(Hons) MCA, etc) within framework of modular system.
Sketch an object-oriented model for a small private airport database that is used to keep track of airplanes, their owners, airport employees, and pilots.
let's consider location information for DUI checkpoints. If law enforcement agencies publish this information, is it okay to have law an app for drivers
Assignment: Research organizational benefits of using databases and DBMS's. Supplement your research with a review of your lessons. Post a response to the discussion board: Respond to the following statements and, if appropriate, include personal e..
Need a three-level schema architecture for the Company that provide better security also design a data abstraction
What are triggers used for, and why are they significant in database systems? Give an example of situation where a trigger would be appropriate. What would implementation of this trigger look like?
identify and explain the differences between a stack and a queue data structure and provide examples of the basic
Design a DSS to help decision-makers run the 2012 London Olympics-Write down the step-by-step solution to train the classifier by the basic perceptron learning rule.
In MySQL Workbench 5.2, create an ER diagram that meets the above requirements. Include both Entity Classes and attributes that are necessary, given the above requirements. Save your ER model as an .mwb file
Write a program that- Reads the data from the file into an array of structure when the form is loaded
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