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To trigger an SMS message to a subscriber using a form published on CloudPages, the developer should use the requestToken and messageContact REST API objects (D). These objects can be used to authenticate and send the SMS message programmatically when the form is submitted.

References:

Salesforce Marketing Cloud MobileConnect API

Salesforce Marketing Cloud REST API

To retrieve which subscribers were sent a particular email using the Marketing Cloud SOAP API, the developer should use the SentEvent (C) SOAP API object. This object records the event when an email is successfully sent to a subscriber.

References:

Salesforce Marketing Cloud SOAP API

SentEvent Object

The Sent data view contains records of all emails that have been sent, including details such as JobID, EventDate, and other relevant information. To gather the required information about emails deployed in the last seven days, the Sent data view should be used.

Query Example:

SELECT JobID, EventDate, COUNT(*) as SentCount FROM _Sent WHERE EventDate >= DATEADD(day, -7, GETDATE()) GROUP BY JobID, EventDate

To select a unique list of subscribers who have made multiple purchases, the developer should use the following SQL statement:

SELECT SubscriberKey FROM Orders GROUP BY SubscriberKey HAVING COUNT(*) > 1

This query groups the records by SubscriberKey and selects only those groups where the count of records is greater than one, indicating multiple purchases.

References:

SQL GROUP BY Statement

SQL HAVING Clause

Data extension functions in AMPscript, such as LookupRows, LookupOrderedRows, and UpdateDE, can most negatively impact send processing because they involve querying and manipulating data extensions. These operations can be resource-intensive and time-consuming, especially when dealing with large data sets.

To personalize the welcome email with the recipient's first name from the Customers data extension, you use the Lookup function to retrieve the FirstName field based on the CustomerKey field.

Lookup Function: The Lookup function retrieves a value from a specified data extension.

Syntax:

%%=Lookup('Customers', 'FirstName', 'CustomerKey', CustomerKey)=%%

'Customers' is the name of the data extension from which to retrieve data.

'FirstName' is the field to retrieve.

'CustomerKey' is the field to match on.

CustomerKey is the value to match in the 'CustomerKey' field of the 'Customers' data extension.