The CData Excel Add-In for Azure DevOps supports standard SQL joins like the following examples.

Inner Join

An inner join selects only rows from both tables that match the join condition:

SELECT Builds.BuildNumber FROM Builds INNER JOIN BuildDefinitions ON BuildDefinitions.Id = Builds.DefinitionId

Left Join

A left join selects all rows in the FROM table and only matching rows in the JOIN table:

SELECT Builds.BuildNumber FROM Builds INNER JOIN BuildDefinitions ON BuildDefinitions.Id = Builds.DefinitionId