Question
Consider the following table and functional dependencies: An agency called Instant Cover supplies part-time/temporary staff to hotels throughout Scotland. The table shown in Figure below
Consider the following table and functional dependencies:
An agency called Instant Cover supplies part-time/temporary staff to hotels throughout Scotland. The table shown in Figure below lists the time spent by agency staff working at two hotels. The National Insurance Number (NIN) is unique for employee.
NIN | ContractNo | hoursPerWeek | eName | hotelNo | hotelLocation |
113567WD | C1024 | 16 | John Smith | H25 | Edinburgh |
234111XA | C1024 | 24 | Diane Hocine | H25 | Edinburgh |
712670YD | C1025 | 28 | Sarah White | H4 | Glasgow |
113567WD | C1025 | 16 | John Smith | H4 | Glasgow |
NIN -> eName
NIN , ContarctNo -> hoursPerWeek
ContarctNo -> hotelNo , hotelLocation
hotelNo -> hotelLocation
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The table is susceptible to update anomalies. Provide examples of insertion, deletion, and modification anomalies.
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Describe and illustrate the process of normalizing the table to 3NF. State any assumptions you make about the data shown in this table.
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