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1. A database at a college is required to support the following requirements. Complete the information-level design for this set of requirements. Use your own experience to determine any constraints you need that are not stated in the problem. Represent the answer in DBDL.
a. For a department, store its number and name.
b. For an advisor, store his or her number and name and the number of the department to which he or she is assigned.
c. For a course, store its code and description.
d. For a student, store his or her number and name. For each course the student has taken, store the course code, course description, and grade received. In addition, store the number and name of the student's advisor. Assume course description, and grade received. In addition, store the number and name of the student's advisor. Assume that an advisor may advise any number of students but that each student has just one advisor.
Developers have noticed that EMP table doesn't have an assigned primary key. EMP_ID column has been selected to be the primary key.
Relational database is based on fact that data in one table can be tied, or related to data in another table. To do this, database utilizes various types of keys to form or define these relationships.
What actions does a referential integrity constraint prevent from occurring when data is inserted in a table that contains this constraint?
Using your knowledge of Premiere Products, determine the functional dependencies that exist in the following table.
Database Modeling and Design: A complete table diagram. Transform model to tables, include all attributes and keys.
Create a function that returns the day of the week for a specified date. Create a trigger that displays the message "Emp table updated" when an update to the employee table increases the employee's basic salary.
Create a database for Ray. He is interested in movies and wants to keep information on movies, actors, and directors in a database. The only user is Ray, and he needs to produce reports.
Practice on topic of Normalization
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.
Illustrate relational algebra expressions for names of all salespeople, names of all salespeople having ORDER row and names of salespeople not having ORDER row.
One of the tenets of database development is to never permit developers to create or own objects during development. All objects are created by application owner and stored in that schema.
What are triggers used for, and why are they important in database systems? Provide an example of a situation where a trigger would be appropriate.
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