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1. Identify and discuss the serious data redundancy problems exhibited by the file structure shown in Figure.
2. Looking at the EMP_NAME and EMP_PHONE contents in Figure, what change(s) would you recommend?
3. Identify the various data sources in the file you examined in Problem 5.
4. Given your answer to Problem 7, what new files should you create to help eliminate the data redundancies found in the file shown in Figure ?
Prepare the example of table which is in first normal form but not in second normal form and example of a table which is in second normal form but not in third normal form.
Design an updateable database for storing customer and sales data. Explain how to deal with the problems of missing data.
Draw the ER diagram for the database described above and create a relational database schema for this model assuming
Draw an ER diagram for database scenario. Design a set of 3NF tables for your database scenario.
Input names of students from user, terminated by ZZZ, and design the data file GRADES with records of form: student (string), test1 (integer), test2 (integer), test3 (integer).
Illustrate relational algebra expressions for names of all salespeople, names of all salespeople having ORDER row and names of salespeople not having ORDER row.
Assume that a student table in a university database has an index on StudentID (the primary key). and additional indexes on Major, Age, Marital status, and HomeZipCode.
Sketch a DFSA for identifiers which contain only letters and digits, where identifier should have at least one letter, but it need not be first character.
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.
Create a link list in ADT c to maintain employee information like name,empid,basic salary and address.1.add employee info to the list if the empid is valid.
Using Microsoft Access, prepare a database and save it as Acme Inc. Prepare the following tables: Employees and Products. Field names for Employees table are first name,
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.
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