Joining two queries to one table and substracting values

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i need to put those two output values (Add_sum and Minus_sum) to one table and subtract them (Add_sum - Minus-sum) and show this value

SELECT        I.ItemCode, COUNT(H.TransactionTypeID) AS ADD_Sum
FROM            inMoveHd AS H INNER JOIN
                         inMoveLn AS L ON L.InvMoveID = H.InvMoveID INNER JOIN
                         inItem AS I ON I.ItemID = L.ItemID INNER JOIN
                         inTransactionType AS T ON H.TransactionTypeID = T.TransactionTypeID
WHERE        (T.TransactionSign = 1)
GROUP BY I.ItemCode'

'

SELECT        I.ItemCode, COUNT(H.TransactionTypeID) AS Minus_Sum
FROM            inMoveHd AS H INNER JOIN
                         inMoveLn AS L ON L.InvMoveID = H.InvMoveID INNER JOIN
                         inItem AS I ON I.ItemID = L.ItemID INNER JOIN
                         inTransactionType AS T ON H.TransactionTypeID = T.TransactionTypeID
WHERE        (T.TransactionSign = -1)
GROUP BY I.ItemCode'
<pre>

What I have tried:

I tried many other options , subqueries etc but could not get it to work

Posted 30-Oct-19 23:02pm

Member 14640212

Updated 30-Oct-19 23:05pm

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Member 14640212 · Accepted Answer · 2019-10-30T23:05:00

ok , ive got it

SELECT  I.ItemCode,
        COUNT(case when T.TransactionSign = 1 then H.TransactionTypeID end) AS ADD_Sum,
        COUNT(case when T.TransactionSign = -1 then H.TransactionTypeID end) AS Minus_Sum
FROM      inMoveHd AS H INNER JOIN
                   inMoveLn AS L ON L.InvMoveID = H.InvMoveID INNER JOIN
                   inItem AS I ON I.ItemID = L.ItemID INNER JOIN
                   inTransactionType AS T ON H.TransactionTypeID = T.TransactionTypeID
WHERE  (T.TransactionSign = -1 or T.TransactionSign = 1)
GROUP BY I.ItemCode