c# - Linq Group by と内部結合

Question

この SQL コマンドを置き換えたい:

string dotazBankUcty = @"SELECT 
     H.UCET, 
     SUM(H.KON_STAV_MD) AS KON_STAV_MD, 
     SUM(H.KON_STAV_DAL) AS KON_STAV_DAL , 
     SUM(H.KON_STAV_MD_MENA) AS KON_STAV_MD_MENA, 
     SUM(H.KON_STAV_DAL_MENA) AS KON_STAV_DAL_MENA, 
     MAX(UBUC.KOD_MENY) AS KOD_MENY 
     FROM UHLAVAKT H 
     inner join UBUC on H.UCET = UBUC.UCET GROUP BY H.UCET";

LINQ コマンドを使用します。これを試してみましたが、必要な内部結合ではなく左結合を返します。

var uhlavAktQuery = new XPQuery<UHLAVAKT>(CoreHelper.DataSession);

var ubucQuery = new XPQuery<UBUC>(CoreHelper.DataSession);

var resultBankyUcty = (from h in uhlavAktQuery
    join u in ubucQuery on h.CompoundKey1.UCET equals u.UCET
    group new { h, u } by new { h.CompoundKey1.UCET } into gUcty
                    select new
                    {
                    Ucet = gUcty.Key.UCET,
                    KON_STAV_MD = gUcty.Sum(k => k.h.KONSTAVMD),
                    KON_STAV_DAL = gUcty.Sum(k => k.h.KONSTAVDAL),
                    KON_STAV_MD_MENA = gUcty.Sum(k => k.h.KONSTAVMDMENA),
                    KON_STAV_DAL_MENA = gUcty.Sum(k => k.h.KONSTAVDALMENA),
                    KOD_MENY = gUcty.Max(k => k.u.KODMENY)
                    });

助けてくれませんか？