DATEPART
Returns just the date part from a value that includes the date and time.
DATEPART ( <date_field or date> )
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date_field or date: The date field to use in the calculation.
Note: dates in Audiences need to be formatted as either YYYY-MM-DD or MM/DD/YYYY. Entering a date as 01-02-2023 would be read as Jan-2 not 1-Feb.
Example: create a field on the CUSTOMER table that returns just the date portion of each customer first purchase.
DATEPART([CUSTOMER.FIRST_PURCHASE_DATE_AND_TIME])