An organization would like to add a secondary email field to its customer database in order to enrich the customer profiles. Which of the following data manipulation techniques should the analyst use to add this information?
Merge combines data from multiple sources based on a key (e.g., Customer ID) and adds new attributes (columns).
In this case, the secondary email field is a new attribute that should be merged into existing records.
The correct answer is C. Append.
Append refers to adding new rows of data to an existing dataset, which is the most appropriate technique for adding additional information like a secondary email field to a customer database. By appending, you're adding new attributes (columns) to each existing record, thus enriching the existing customer profiles with additional data.
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