Final answer:
A 'one to many' join in the context of different data sources refers to a relationship where one record from the first table can be matched with multiple records in the second table.
Step-by-step explanation:
Computers and Technology
In the context of data sources, a 'one to many' join refers to a relationship where one record from the first table can be matched with multiple records in the second table. When performing a 'one to many' join across different data sources, the result will be a data set that includes all the records from the first table, with the matching records from the second table repeated for each match. For example, if you have a table of customers and a table of orders, with each customer having multiple orders, a 'one to many' join would result in a data set where each customer record is repeated for each order they have.