Map a sub-mapping
For more information, see Sub-mappings.
Create a mapping for the table that will be mapped onto an attribute in another table.
For example, the
users_phones_setfunction for theusers_phonestable in a target Google system.

Repeat step (1) for any additional tables that will be mapped onto attributes.
For example, the
users_externalIds_setfunction for theusers_externalIdstable in a target Google system.Edit (or create) the mapping containing the attribute(s) in question. See Edit a mapping.
For example, the
userstable in a target Google system.Click the relevant attribute's Source field and select
mapping. Then click its Value Specification field and select the relevant mapping that you created previously.For example, map the
google_users_phones_setmapping onto thephonesattribute.
Repeat step (4) for any additional attributes.
For example, map the
google_users_externalIds_setmapping onto theexternalIdsattribute.
Click Save.