You administer a Microsoft SQL Server 2012 database. The database contains a table
named Employee. Part of the Employee table is shown in the exhibit. (Click the Exhibit button.)
Confidential information about the employees is stored in a separate table named
EmployeeData. One record exists within EmployeeData for each record in the Employee
table. You need to assign the appropriate constraints and table properties to ensure data
integrity and visibility. On which column in the Employee table should you a create a unique
constraint?
A.
DateHired
B.
DepartmentID
C.
EmployeelD
D.
EmployeeNum
E.
FirstName
F.
JobTitle
G.
LastName
H.
MiddleName
I.
ReportsToID
C: EmployeeId
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EmployeeID is already unique because it is the PK.
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Watch the text: EmployeeNum has to be “unique within the table”! D is right!
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A agree
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D is the correct answer since its unique and its within the Employee table only.
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Best Regards!
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