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1. The DBA denormalized some of the data in the Premiere Products database to improve performance, and oneof the resulting tables is the following:
Customer (CustomerNum, CustomerName, Street, City,State, Zip, Balance, CreditLimit, RepNum, RepName)
Which field or fields cause the table to no longer be in third normal form? In which normal form is the denormalized table?
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.
List the sequence of relational algebra operations needed to implement the queries.
Draw an Entity Relationship diagram for the system and Identify the table design for the database displaying all the fields/attributes. Ensure that all tables are in 3NF. You also need to identify the primary keys and foreign keys, where applicable..
What is lock granularity? Explain the use of BEGIN, COMMIT, and ROLLBACK TRANSACTION statements. Explain the meaning of expression ACID transaction.
Your job is to create a database management system for bike shop who ‘buys' and ‘sells' new and second-hand bikes, and also parts of bike. Bike is constructed with parts while part can be fitted to different bikes.
Draw an ER diagram for your database scenario. Design a set of 3NF tables for your database scenario.
First, specify the foreign keys for this schema, stating any assumptions you make. Next, populate the relations with a few example tuples.
These following questions require to you to create entities and their relationship using the Crow's Foot notation suitably.
Use the results of the transcripts of an interview with IT consultant. Prepare a Fully Attributed Data Model. Add the data attributes for each entity."
Draw the E/R diagrams for the business rules
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.
Compute the functional dependencies which exist in following table. After determining the functional dependencies, transform this table to an equivalent collection of the tables which are in third normal form.
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