SQL Query Second sum column squaring results - sql

Question

If I run 2 queries separately I get results like this..
select A.ACTNUMST, sum(B.EXTDCOST) as [IV Total]
from GL00105 A
INNER JOIN SEE30303 B on A.ACTINDX = B.IVIVINDX
group by A.ACTNUMST
Results -
Account No IV Total
2101-00-137 2033.60
4101-00-137 83765.86
6101-00-137 301984.23
Second Query
select A.ACTNUMST as [Account No], SUM(C.PERDBLNC) as [GL Total]
from GL00105 A
LEFT JOIN GL10110 C on A.ACTINDX = C.ACTINDX
group by A.ACTNUMST
Results -
Account No GL Total
2101-00-137 2033.60
4101-00-137 83765.86
6101-00-137 302656.23
I want to be able to join both results together to compare but I believe it is repeating the sum for each line in the GL total and then summing it again, it comes out with large numbers like -
select A.ACTNUMST as [Account No], sum(B.EXTDCOST) as [IV Total], SUM(C.PERDBLNC) as [GL Total]
from GL00105 A
INNER JOIN SEE30303 B on A.ACTINDX = B.IVIVINDX
LEFT JOIN GL10110 C on A.ACTINDX = C.ACTINDX
group by A.ACTNUMST
Results -
Account No IV Total GL Total
2101-00-137 2033.60 14235.20
4101-00-137 83765.86 116350696.20
6101-00-137 301984.23 1612897825.84
When it should be
Results -
Account No IV Total GL Total
2101-00-137 2033.60 2033.60
4101-00-137 83765.86 83765.86
6101-00-137 301984.23 302656.23
Please advise how to use the sum function to get the correct results.

Answer 1

Do you want something like this? Please check and comment if this is not what is expected.
Also please rectify any syntax errors.
SELECT T1.[Account No], T1.[IV Total], T2.[GL Total] FROM
(
select A.ACTNUMST as [Account No], sum(B.EXTDCOST) as [IV Total]
from GL00105 A
INNER JOIN SEE30303 B on A.ACTINDX = B.IVIVINDX
group by A.ACTNUMST
) T1
INNER JOIN
(
select A.ACTNUMST as [Account No], SUM(C.PERDBLNC) as [GL Total]
from GL00105 A
LEFT JOIN GL10110 C on A.ACTINDX = C.ACTINDX
group by A.ACTNUMST
) T2
ON T1.[Account No] = T2.[Account No]
Hope this helps

Answer 2

this can be done with the multiple cte also
with IVTotal as
(
select A.ACTNUMST, sum(B.EXTDCOST) as [IV Total]
from GL00105 A
INNER JOIN SEE30303 B
on A.ACTINDX = B.IVIVINDX
group by A.ACTNUMST
),
GLTotal as
(
select A.ACTNUMST as [Account No], SUM(C.PERDBLNC) as [GL Total]
from GL00105 A
LEFT JOIN GL10110 C
on A.ACTINDX = C.ACTINDX
group by A.ACTNUMST
)
select a.*,b.[GL Total]
from IVTotal a ,GLTotal b
where a.ACTNUMST = b.aCTNUMST