Hi JD,
Try this ..
select t0.ShortName,t2.CardName ,t0.Account,t1.AcctName ,t0.TransId ,t0.RefDate ,t0.Credit ,t0.Debit ,t0.Ref1 ,t0.Ref2 from jdt1 t0 left outer join OACT t1 on t0.Account=t1.AcctCode left outer join OCRD t2 on t0.ShortName=t2.CardCode where t0.ShortName in (select cardcode from OCRD )
-Rajesh NS