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- Repeat each question above each response
- Answer in your own words, and reference sources
1. Why do today's Internet Web applications and smartphone apps need databases?
2. Describe the purpose of a database.
3. What is a modification problem? Describe the impact of three possible types of modification problems.
4. Define and describe the purpose of an ID column.
What is enterprise data modeling? - What is an entity-relationship model and what is its purpose? What is data cleansing?
Map the EER schema into a set of relations. For the VEHICLE to CAR/ TRUCK/ SUV generalization, consider the four options presented
If a foreign key contains either matching values or nulls, the table(s) that make use of such a foreign key is/are said to exhibit __________ integrity
You are a vice president of marketing for a nation-wide appliance manufacturer with three production plants. Explain different ways you would tend to analyze your sales. What are the business dimensions for your analysis?
problemconsider the following schema of ra b c d with functional dependenciesa -gt b b-gt c and b-gtd1- compute the
Design an ER schema with attributes, primary keys, cardinalities and participation constraints if appropriate
Write down the responsibilities of the database administrator (DBA)? Could you outline tasks that he/she has to perform, and what could be consequences if these matters are not handled?
The relational set operators UNION, INTERSECT, and EXCEPT (MINUS) work properly only when the relations are union-compatible. What does union-compatible mean.
Find domains for which there is none or only one current employee with that expertise - Find the minimum billing rate for each employee type for the most recent billing rate effective date;
Write query to display first name and last name as full name
Controls which need a database to either execute transaction completely or not at all.
Develop an E-R diagram for the library database. The relation schemas for the library database.
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