问题:
A . Specify that the Cust_CalcData column must be implemented as a computed column of the table.
B . Specify that the Cust_CalcData column must be indexed using a non-clustered index.
C . Specify that the Cust_CalcData column must be implemented as a column that uses a user-defined data type.
D . Specify that the Cust_CalcData column must be updated by a SQL Server Agent job that runs nightly.
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