UPDATE temp.dbo.KARTA_TMP SET
        TYP_ID = CASE WHEN (select WAREHOUSE_ID from target.dbo.WLASCICIEL_KEY as A, temp.dbo.KARTA_TMP as B where A.WAREHOUSE_ID=B.WLASCICIEL_ID and A.SYST='DB') is null THEN null
        ELSE (select WAREHOUSE_ID from target.dbo.WLASCICIEL_KEY as A, temp.dbo.KARTA_TMP as B where A.WAREHOUSE_ID=B.WLASCICIEL_ID and A.SYST='DB') END