c1.accno AS inventory_accno,
c2.accno AS income_accno,
c3.accno AS expense_accno
FROM parts p
LEFT JOIN buchungsgruppen bg ON p.buchungsgruppen_id = bg.id
c1.accno AS inventory_accno,
c2.accno AS income_accno,
c3.accno AS expense_accno
FROM parts p
LEFT JOIN buchungsgruppen bg ON p.buchungsgruppen_id = bg.id