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A military information system on a base overseas tracks personnel on the base. Each military member is tracked by ID#, name, rank, and address. Each military member belongs to an organization on the base which has an organizational name, located in a building on the base and has a primary function (e.g. Communications Squadron). Each of these organizations is also commanded by one of the military members . In tracking command sponsorship each military member may have one or more dependents. Each dependent has an ID#, name, age, and sex. Each organization on the base is involved working issues or projects which may be of interest to the base commander. Each organization also belongs to a command which has a location and a unique numerical designation. The Organization's projects are tracked by a serial number and an origination date. The information system you are designing will also track descriptions of the projects and their close-out dates.
Build an entity relationship model for the above scenario. Show all attributes and indicate all of your key attributes in red.
Design and build a prototype data warehouse using the data on Spend over £25,000 in the Science and Technology Facilities Council
An ER diagram for the system. Show all entities, relationships, cardinalities and optionalities. Also, include all intersection entities. You must use the Finkelstein methodology as per the study book and tutorials.
Compare the two non-sequential file structure models. What advantages does the first one have over the second and what advantages does the second have over the first?
Write a SELECT statement which returns three columns: VendorName, InvoiceCount, and InvoiceSum. InvoiceCount is the count of the number of invoices, and InvoiceSum is the sum of the InvoiceTotal column.
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,
Describe how you would implement relationship between employees and projects in each of the given scenarios: Many employees can work on given project, but each employee can work on only single project.
You have been requested to give preliminary information on the data requirements for a GIS which is to be used to hold inventory of continental scale vegetation maps for coarse scale land surface
Identify each relationship type and write all of the business rules and create the bask Crow's Foot ERD for DealCo.
Create an update query to select all records in the tblOverPriced, decrease the Price field values by 10%, run and close the query.
Compute a canonical cover for the above set of functional dependencies (show each step of your derivation with an explanation).
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?
Construct a scenario leading to the worst-case performance of the FIFO buffer replacement policy - determine if it is conflict serializable or not
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