Ricambi e manutenzione

select distinct a1 from [dbo].[nccat4_xcattab_riccrick] x inner join [dbo].[nccat4_Product] p on p.code=x.code inner join [dbo].[nccat4_xcattab_global] g on g.code=p.code left outer join nccat4_stock s on s.code=p.code where isnull(a1,'')<>'' and p.type=0 AND g.mnu in ('MENU2_EJC','MENU2_EJK') ORDER BY a1