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1. Suppose a given user view contains information about employees and projects. Suppose further each employee has a unique EmployeeNum and each project has a unique ProjectNum. Explain how you would implement the relationship between employees and projects in each of the following scenarios:
a. Many employees can work on a given project, but each employee can work on only a single project.
b. An employee can work on many projects, but each project has a unique employee assigned to it.
c. An employee can work on many projects, and a project can be worked on by many employees.
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?
You have just received a new computer at work. it runs fast and works great. thinking about the future and the day something might break explain why it is important to record this information.
Compare activity (quite theoretical) of the disk (in number of bytes) required for each of both relational. Write down the advantages and inconveniences of new relational scheme.
Write the following procedures: woman_wants_to_enter, man_wants_to_enter, woman_leaves, man_leaves, using counters and sychronisation techniques to ensure that the correct behaviour will occur.
Examine different sales transactions. Design a context diagram and a level-0 diagram that represent the selling system at the store.
Draw the E/R diagrams for the business rules
Suppose you have a table which contains 27,000 data records, and you have unclustered B+ Tree Index on the table.
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?
Indicate the changes (using the shorthand representation) that you would need to make to the original premiere products database desing to support the following requirements.
Complete (i.e., reverse engineering) ER diagram below such that 4 relation schemas above are exactly result of a translation from the ERD to the relational model.
Course: data mining. Require a 7 page essay on subjects: Warehouse Architectures: the paper requires to contain information about centralized, federated, and tiered data warehouse.
You have been asked to develop a database utilizing only the written problem description given by the client. In reviewing the description.
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