SQL Server - resetting a running total - sql-server

Question

I am trying to derive a paging logic.
I have fields like:
RecordNo Lines
1 20
2 130
3 50
4 60
5 350
6 100
Say my pagesize is 170 lines.
The result I want to get is:
RecordNo Lines CumSum PageNo
1 20 20 1
2 130 150 1
3 50 50 2 (as cumulative sum 200 exceeds 170, reset to 0)
4 60 110 2
5 350 350 3 ((as cumulative sum 460 exceeds 170, reset to 0)
6 100 100 4 ((as cumulative sum 460 exceeds 170, reset to 0)
I can do it using cursor, but is there a way to achieve it by SQL(s) only?
Here is the ddl and sample data as posted by the OP:
CREATE TABLE PAGING (RECORDNO INT, LINES INT );
INSERT INTO PAGING VALUES(1,20);
INSERT INTO PAGING VALUES(2,130);
INSERT INTO PAGING VALUES(3,50);
INSERT INTO PAGING VALUES(4,60);
INSERT INTO PAGING VALUES(5,350);
INSERT INTO PAGING VALUES(6,100);
Update:
Zohar, Thanks for looking into this. The query worked perfectly with the data I gave but when I extended with more data, it does not give correct result as pagebase does not move with sum exceeding 170.
Here is the data I tried the SQL with:
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (1, 20);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (2, 130);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (3, 50);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (4, 60);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (5, 350);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (6, 100);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (7, 20);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (8, 10);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (9, 20);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (10, 30);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (11, 5);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (12, 5);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (13, 5);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (14, 10);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (15, 205);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (16, 156);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (17, 5);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (18, 2);
INSERT [dbo].[PAGING] ([RECORDNO], [LINES]) VALUES (19, 7);

Answer 1

Update:
Here is the complete solution and it's fiddle link:
WITH cte AS
(
SELECT RECORDNO,
LINES,
SUM(LINES) OVER (ORDER BY RECORDNO) CumSum,
SUM(LINES) OVER (ORDER BY RECORDNO) / 170 AS PageNumberBase
FROM PAGING
)
SELECT RECORDNO,
LINES,
SUM(LINES) OVER (PARTITION BY PageNumberBase ORDER BY RECORDNO) As CumSum,
DENSE_RANK() OVER(ORDER BY PageNumberBase) As PageNumber
FROM cte
ORDER BY RECORDNO
First version:
Using dense_rank window function and a cte I was able to produce something very close, just the cumSum is not perfect.
Unfortunatly I don't have the time to play with it more so I'll leave it here with a link to sqlFiddle and hope the OP or someone else will be able to complete the solution:
WITH cte AS
(
SELECT RECORDNO,
LINES,
SUM(LINES) OVER (ORDER BY RECORDNO) CumSum,
SUM(LINES) OVER (ORDER BY RECORDNO) / 170 AS PageNumber
FROM PAGING
)
SELECT RECORDNO,
LINES,
PageNumber,
CumSum - (170 * PageNumber) As CumSum,
DENSE_RANK() OVER(ORDER BY PageNumber)
FROM cte
Here is the link to the fiddle