Group By - Using Absolute Values - tsql

Question

I'm trying to display an accounting report where I show total transactions, voids, the transaction fee, and a total amount for each transaction type.
TransactionType Amount TransactionCount TotalAmount
AgentCredit -$1.00 49 -$49.00
MailFee -$1.25 11 -$13.75
MailFee $1.25 531 $663.75
HardCardFee -$5.00 7 -$35.00
HardCardFee $5.00 239 $1,195.00
QuotaHuntFee -$2.00 1 -$2.00
QuotaHuntFee $2.00 202 $404.00
But what I want to display would look like the following:
TransactionType Amount TransactionCount TotalAmount TotalTrans Voids
AgentCredit -$1.00 49 -$49.00 49 0
MailFee $1.25 520 $650.00 531 11
HardCardFee $5.00 232 $1,160.00 239 7
QuotaHuntFee $2.00 201 $402.00 202 1
Would it be possible to group the transaction types using the absolute value of the Amount and calculate the grand total along with the transaction count & void counts?
This is on SQL Server 2014.
Thanks,

Answer 1

I think this does it
declare #T table (nm varchar(20), prc smallmoney, amt int);
insert into #T values
('AgentCredit', -1.00, 49)
, ('MailFee', -1.25, 11)
, ('MailFee', 1.25, 531)
, ('HardCardFee', -5.00, 7)
, ('HardCardFee', 5.00, 239)
, ('QuotaHuntFee', -2.00, 1)
, ('QuotaHuntFee', 2.00, 202);
with cte as
(
select t.*, (t.prc * t.amt) as net
, count(*) over (partition by t.nm, abs(t.prc)) as cnt
, row_number() over (partition by t.nm, abs(t.prc) order by t.prc) as rn
, lag(t.prc) over (partition by t.nm, abs(t.prc) order by t.prc) as prPrc
, lag(t.amt) over (partition by t.nm, abs(t.prc) order by t.prc) as prAmt
, case when lag(t.prc) over (partition by t.nm, abs(t.prc) order by t.prc) < 0 then t.amt - lag(t.amt) over (partition by t.nm, abs(t.prc) order by t.prc)
else t.amt
end as bal
from #T t
)
select *, ISNULL(t.prAmt, 0) as void
, bal*prc as nnet
from cte t
where t.cnt = 1
or t.rn = 2
order by t.nm, t.prc;

Answer 2

There's a bit of confusion around your results with the data you've provided. HardCardFee has 7 and 23 in the sample you provided, but you want to return 232 for the total?.. MailFee also has some inconsistent math. Also, your 'Voids' returns 0 for the first row; however, it seems as if there are 49?
Perhaps this query could get you started down the right path:
DECLARE #Table TABLE (TransactionType varchar(20), Amount decimal(10,2), TransactionCount int, TotalAmount decimal(10,2))
INSERT #Table
VALUES ('AgentCredit' ,-$1.00 ,49 ,-$49.00 ),
('MailFee' ,-$1.25 ,11 ,-$13.75 ),
('MailFee' ,$1.25 ,531 ,$663.75 ),
('HardCardFee' ,-$5.00 ,7 ,-$35.00 ),
('HardCardFee' ,$5.00 ,23 ,$1195.00 ),
('QuotaHuntFee' ,-$2.00 ,1 ,-$2.00 ),
('QuotaHuntFee' ,$2.00 ,202 ,$404.00 )
;WITH c AS (
SELECT TransactionType, Amount, TransactionCount, TotalAmount,
CASE WHEN t.Amount + ABS(t.Amount) = 0 THEN '-' ELSE '' END +
CAST(t.TransactionCount AS VARCHAR(10)) AS TCount
FROM #Table t
)
SELECT t.TransactionType
,MAX(t.Amount) AS Amount
,SUM(CAST(t.TCount AS INT)) AS TransactionCount
,SUM(t.TotalAmount) AS TotalAmount
,SUM(ABS(t.TransactionCount)) AS TotalTrans
,ABS(MIN(t.TCount)) AS Voids
FROM c t
GROUP BY TransactionType
Again, not sure about some of the values provided.