For every teacher record in a database, there is an attribute called Department. This attribute specifies the department name. At times, the name may contain the numeric department id concatenated with it. However, it can never comprise only of the department id. Department name is optional in a teacher record.
Identify the correct components for the domain of the attribute Department.
Date
Integer
NULL
Alphanumeric (String and Integer)
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integer is the correct attribute of department.
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