Sql Query Compare and Sum - sql

Question

I have these problem I need to match the sum a columns to see if they match with the Final Total of the Invoice by Invoice Number ( I am working in a query to do it)
Example
Invoice No Line _no Total Line Invoice total Field I will create
----------------------------------------------------------------------
45 1 145 300 145
45 2 165 300 300 Match
46 1 200 200 200 Match
47 1 100 300 100
47 2 100 300 200
47 3 100 300 300 Match

Answer 1

You want a cumulative sum. In SQL Server 2012+, just do:
select e.*,
(case when InvoiceTotal = sum(InvoiceTotal) over (partition by invoice_no order by line_no)
then 'Match'
end)
from example e;
In earlier versions of SQL Server, I would be inclined to do it with a correlated subquery:
select e.*
(case when InvoiceTotal = (select sum(InvoiceTotal)
from example e2
where e2.Invoice_no = e.invoice_no and
e2.line_no >= e.line_no
)
then 'Match'
end)
from example e;
You can also do this with a cross apply as M Ali suggests.
EDIT:
Now that I think about the problem, you don't need a cumulative sum. That was just how I originally thought of the problem. So, this will work in SQL Server 2008:
select e.*,
(case when InvoiceTotal = sum(InvoiceTotal) over (partition by invoice_no)
then 'Match'
end)
from example e;
You can't get the cumulative sum out (the second to last column) without more manipulation, but the match column is not hard.

Answer 2

SQL Fiddle
MS SQL Server 2008 Schema Setup:
CREATE TABLE TEST(InvoiceNo INT, Line_no INT, TotalLine INT, InvoiceTotal INT)
INSERT INTO TEST VALUES
(45 ,1 ,145 ,300),
(45 ,2 ,165 ,300),
(46 ,1 ,200 ,200),
(47 ,1 ,100 ,300),
(47 ,2 ,100 ,300),
(47 ,3 ,100 ,300)
Query 1:
SELECT t.[InvoiceNo]
,t.[Line_no]
,t.[TotalLine]
,t.[InvoiceTotal]
,C.Grand_Total
,CASE WHEN C.Grand_Total = t.[InvoiceTotal]
THEN 'Match' ELSE '' END AS [Matched]
FROM TEST t
CROSS APPLY (SELECT SUM([TotalLine]) AS Grand_Total
FROM TEST
WHERE [InvoiceNo] = t.[InvoiceNo]
AND [Line_no] < = t.[Line_no]) C
Results:
| INVOICENO | LINE_NO | TOTALLINE | INVOICETOTAL | GRAND_TOTAL | MATCHED |
|-----------|---------|-----------|--------------|-------------|---------|
| 45 | 1 | 145 | 300 | 145 | |
| 45 | 2 | 165 | 300 | 310 | |
| 46 | 1 | 200 | 200 | 200 | Match |
| 47 | 1 | 100 | 300 | 100 | |
| 47 | 2 | 100 | 300 | 200 | |
| 47 | 3 | 100 | 300 | 300 | Match |

Answer 3

Is this what you're looking for? I think subquery is what you're asking about, but i'm guessing to get an end result similar to the entire thing.
select t."Invoice No", t."Line no_", t."Invoice total",
calcTotals.lineNum as calcSum, case when t."Invoice total" = calcTotals.lineNum then 'matched' else 'not matched' end
from [table] t
inner join (
select "Invoice No" as invoiceNumber,
sum("Line _no") as lineNum
from [table]
group by "Invoice No"
) calcTotals on t."Invoice No" = calcTotals.invoiceNumber