Select
  a1.AccountNr,
  a1.Description,
  [Transaction].RelationAccount,
  a2.Description As Description1
From
  ([Transaction] Inner Join
  Account a1 On [Transaction].FKAccount = a1.id) Inner Join
  Account a2 On [Transaction].RelationAccount = a2.AccountNr
Group By
  a1.AccountNr,
  a1.Description,
  [Transaction].RelationAccount,
  a2.Description
Order By
  a1.AccountNr,
  [Transaction].RelationAccount
