You use Microsoft SQL Server 2012 to develop a database application. You need to implement a computed column that references a lookup table by using an INNER JOIN against another table.

What should you do?

A. Reference a user-defined function within the computed column.

B. Create a BEFORE trigger that maintains the state of the computed column.

C. Add a default constraint to the computed column that implements hard-coded values.

D. Add a default constraint to the computed column that implements hard-coded

CASE statements.

Explanation:

A common way to define a computed column is by using a user-defined function (UDF) to encapsulate the calculation logic.

References: https://blogs.msdn.microsoft.com/sqlcat/2011/11/28/a-computed-column-defined-with-a-user-defined-function-might-impact-query-performance/