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SQL 2008 - Running total partition over Company - for each grouping per Company - run total else reset

Hi, I spent a lot of time looking through a lot of results on google, but can't get exactly what I need even after changing many methods of the examples

 
Drop Table #Checks
CREATE TABLE #Checks
(
  Client VARCHAR(32),
  RowNr int,
  Amount DECIMAL(12,2)
);

INSERT #Checks(Client, RowNr, Amount)
          SELECT 'Company A', '1', 50
UNION ALL SELECT 'Company A', '2', 75
UNION ALL SELECT 'Company A', '3', 120
UNION ALL SELECT 'Company B', '4', 75
UNION ALL SELECT 'Company A', '5', 40
UNION ALL SELECT 'Company B', '6', 200
UNION ALL SELECT 'Company B', '7', 90;

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select * from #checks
I need help on getting it to (Sort by RowNumber) and reset whenever a company changes please. Thus

Company A Running Total 50
Company A Running Total 125
Company A Running Total 245
Company B Running Total 75
Company A Running Total 40
Company B Running Total 200
Company B Running Total 290

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0
jxharding
Asked:
jxharding
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1 Solution
 
PortletPaulCommented:
have you tried the row_number() analytic function?
0
 
jxhardingAuthor Commented:
Hi, Row_Number() was used previously yes, any hint on how to use it in this scenario? The RowNumbers are already generated?
0
 
PortletPaulCommented:
this is a quick reply, using a cte to simulate the temp table - but using row_number() to re- sequence the output.
CLIENT	AMOUNT	ROWNR
Company A	50	1
Company A	75	2
Company A	120	3
Company A	40	4
Company B	75	1
Company B	200	2
Company B	90	3


with #checks (client, RowNr, Amount)  as (
                      SELECT 'Company A', '1', 50
            UNION ALL SELECT 'Company A', '2', 75
            UNION ALL SELECT 'Company A', '3', 120
            UNION ALL SELECT 'Company B', '4', 75
            UNION ALL SELECT 'Company A', '5', 40
            UNION ALL SELECT 'Company B', '6', 200
            UNION ALL SELECT 'Company B', '7', 90
            ),
rechecks as (
              select
                 client
               , amount
               , row_number() over (partition by client order by rownr) as rownr
              from #checks
            )
select
*
from rechecks
order by client, RowNr
;

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see http://sqlfiddle.com/#!3/1fa93/7924
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PortletPaulCommented:
>>any hint on how to use it in this scenario? The RowNumbers are already generated?
I hope my previous post answers this

it's really up to you, but I would suggest
row_number() over (partition by client order by RowNr) as <<something you choose>>

the 'partition by client' will re-start the numbers for each client, &
the 'order by rowNr' will leverage the wanted sequence

you can give this calculated column a different alias - i just re-used rowNr above.
0
 
jxhardingAuthor Commented:
Thanks, I think we missed each other on this one unfortunately. I'd like to keep the existing row numbers, and create a running total for each company, until the company changes, which then resets the running total -
e.g.

Company A (First case) Running Total 50
Company A (First case) Running Total 125
Company A (First case) Running Total 245
Company B (Second case) Running Total 75
Company A (Third case) Running Total 40
Company B (Fourth case) Running Total 200
Company B (Fourth case) Running Total 290
0
 
PortletPaulCommented:
Oh, and you don't have to use CTEs, let's assume you continue with the temp table, then it could look like this:
select
client, amount, rowNr, rowNr2
from (
              select
                 client
               , amount
               , rowNr
               , row_number() over (partition by client order by rownr) as rownr2
              from #checks
            ) as rechecks
from rechecks
order by client, RowNr2

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0
 
PortletPaulCommented:
running total ....my bad ... hold on ... most sorry
0
 
PortletPaulCommented:
this is SQL Server 2008 - is that correct? (or is it 2012?)
0
 
jxhardingAuthor Commented:
SQL Server 2008 yes please, thanks!
0
 
PortletPaulCommented:
mmm, not sure I can get this in 2008, this is NOT correct but its as close as I can get right now (in the sample provided the last number is wrong)
CLIENT	ROWNR	AMOUNT	RUNTOTAL
Company A	1	50	50
Company A	2	75	125
Company A	3	120	245
Company B	4	75	75
Company A	5	40	40
Company B	6	200	200
Company B	7	90	365 --<< wrong, 290 expected


-- with this code
with cte as (
            select
                    c1.client
                  , c1.amount
                  , c1.rowNr
                  , case when c1.client <> c2.client then c1.amount else null end amt
            from checks as c1
            left join checks as C2 on c1.rownr = (c2.rownr + 1)
  )

select
client
, rownr
, amount
, case when amt > 0 then amt else total end as runtotal
from cte
cross apply (
                select
                       sum(x.amount) as Total
    			from cte as x
    			where x.rownr <= cte.rownr and cte.client = x.client
    		) as rt
;

-- using this
CREATE TABLE Checks
(
  Client VARCHAR(32),
  RowNr int,
  Amount DECIMAL(12,2),
  RunTotal DECIMAL(12,2)
);

INSERT Checks(Client, RowNr, Amount)
          SELECT 'Company A', '1', 50
UNION ALL SELECT 'Company A', '2', 75
UNION ALL SELECT 'Company A', '3', 120
UNION ALL SELECT 'Company B', '4', 75
UNION ALL SELECT 'Company A', '5', 40
UNION ALL SELECT 'Company B', '6', 200
UNION ALL SELECT 'Company B', '7', 90;

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0
 
jxhardingAuthor Commented:
This is brilliant, thank you very much! Will definitely be able to used this as an example! Thanks again!!
0
 
PortletPaulCommented:
are you sure? it's NOT fully correct
0
 
jxhardingAuthor Commented:
I'm sure i'll be able to battle out the last one, way better than anything I was able to get, thank you again!
0

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