I'm not a genius when it comes to SQL, but I do know that this is the information needed to create the query:
vB Table: pc_vbulletin.userfield
Columns needed: userid, field7
vB Table: pc_vbulletin.profilefield
Columns needed: profilefieldid, data
XF Table: pc_xenforo.xf_user_field
VB field7 is equal to field_id 'package' in XF
Will have to convert vb's data column to XF's field_choices somehow.