Your company stored customer data, including credit card numbers, in a Microsoft SQL Server database.
The CreditCardNum column is configured as a varchar(16). When viewing the CreditCardNum column, only the last four digits of the card number should be displayed.
You have the following Transact-SQL statement. (Line numbers are included for reference only.)
You need to implement dynamic data masking for the CreditCardNum column.
Which Transact-SQL segment should you insert at line 05?