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In physical database design, referential integrity constraints can be defined. What actions does referential integrity constraint prevent from happening when data is inserted in table which contains this constraint? Let INSERT, UPDATE, and DELETE actions on both child and the parent.
Create tables in 3NF. As you create the database, include different codes for at least three of the fields. Use sample data to populate fields for at least three records in each table.
Hhow can you change column name or what is a different way to write statement in SQL so it displays the amount column as money.
Write a program that will ask the user to enter the last names of our candidates in a class officer's president election and the number of votes received each candidate.
Create a Data Warehouse conceptual design using Star Schema Modelling and document all steps during the design process
List the students ID, name, GPA, and course Number such that all students have GPA greater than 3 . 5 and enrolled in a course in Jan 1, 2011. Find the names of all students who have GPA greater than 3.
Describe how to create a query in Access Query Wizard equilvant to the query: SELECT first, last, department, hours FROM payroll WHERE hours>.
Using Internet as the research tool for extra information not presented in text, describe why application roles are important part of the security model for databases.
Create a context level DFD. You should take your DFD to your tutorial for feedback before starting on the ER.
Provide expression in relational algebra for each of the following queries: Give all the managers in database a 10 percent salary raise. Give all the other employees a 5 percent salary raise.
You are asked to create a GIS database of information about Vietnam at scale of 1:100,000. Database will include the following: Which of these features are best represented by raster model? Explain why?
Why do you believe that views by themselves are insufficient for protecting access by unauthorized users?
Assume that relation Employee has no tuples in it initially. You are to show the simplest example you can think of where using trigger T1 will produce a different final database state than using trigger T2.
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