How to use three query as a subquery? Below is query ,i want to convert it into sub query
    declare @FirstDOM datetime, @LastDOM datetime
set @FirstDOM = (select CONVERT(DATE,dateadd(dd,-(day(getdate())+30),getdate())) )
set @LastDOM = (select dateadd(s,-1,dateadd(mm,datediff(m,0,getdate())+1,0))) 

--First Query 

SELECT SUM(QTY) AS QTY, SUM(IWeight) AS Weight, EntryDate
FROM     ConIssuance
where EntryDate between @FirstDOM and @LastDOM 
GROUP BY EntryDate
order by EntryDate asc

--Second Query
SELECT SUM(s.prdqty) AS qty, SUM(i.weight) AS Expr1, s.EntryDate
FROM     Probale AS s INNER JOIN
                  ItemMasterFile AS i ON i.CodeItem = s.Codeitem
                  where S.EntryDate between @FirstDOM and @LastDOM 
GROUP BY s.EntryDate

--Third Query

SELECT SUM(Bweight) AS weight, SUM(Bpqty) AS qty, EntryDate
FROM     Bigbalprd
 where EntryDate between @FirstDOM and @LastDOM 
GROUP BY EntryDate

Output  Horizontally.
you can do it this way:
;WITH FirstQuery  AS (
    SELECT SUM(QTY) AS QTY, SUM(IWeight) AS Weight, EntryDate
    FROM     ConIssuance
    where EntryDate between @FirstDOM and @LastDOM 
    GROUP BY EntryDate
    order by EntryDate asc
)
,SecondQuery AS (
    SELECT SUM(s.prdqty) AS qty, SUM(i.weight) AS Expr1, s.EntryDate
    FROM     Probale AS s INNER JOIN
                      ItemMasterFile AS i ON i.CodeItem = s.Codeitem
                      where S.EntryDate between @FirstDOM and @LastDOM 
    GROUP BY s.EntryDate
)
,ThirdQuery AS (
    SELECT SUM(Bweight) AS weight, SUM(Bpqty) AS qty, EntryDate
    FROM     Bigbalprd
     where EntryDate between @FirstDOM and @LastDOM 
    GROUP BY EntryDate
)
SELECT *
FROM FirstQuery
JOIN SecondQuery ON SecondQuery.EntryDate = FirstQuery.EntryDate
JOIN ThirdQuery ON ThirdQuery.EntryDate = FirstQuery.EntryDate;

If you have gaps (no records for some dates in some of three tables) you may need to use FULL JOIN with a bit more complex join conditions or even generate a list of dates (in case if you need a row for each date even when data for this date is not presented in any of your tables)