Question: In the following Database Design Language ( DBDL ) notation, what does SK stand for? Employees ( EmpID , LastName, FirstName, SSN , DeptNum )

In the following Database Design Language (DBDL) notation, what does SK stand for?
Employees (EmpID, LastName, FirstName, SSN, DeptNum)
AK SSN
SK LastName, FirstName
FK DeptNum Departments
Group of answer choices
secondary key
start key
subkey
SQL key

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