Increment row depending on value of another column - sql

Question

I have a sql query below, where dtMontno could start from any month and am adding Row column manually as below :
SELECT COUNT(*) as count,
MONTH(TourTbl.DT_Started) as dtMonthno,
DATENAME(YYYY, TourTbl.DT_Started) as dtYear,
row_number() over (order by DATENAME(YYYY, TourTbl.DT_Started) asc,
MONTH(TourTbl.DT_Started) asc ) as Row
FROM TourTbl
INNER JOIN BranchTbl ON TourTbl.BranchID = BranchTbl.BranchID
INNER JOIN AgencyTbl on AgencyTbl.AgencyID = BranchTbl.AgencyID
WHERE Cancelled = 0 AND
(TourTbl.DT_Started >= '2010/03/15' and
TourTbl.DT_Started <= '2012/03/15') AND
AgencyTbl.AgencyID in ( 245 ) and
BranchRODID > 0
group by datename(M, TourTbl.DT_Started),
DATENAME(YYYY, TourTbl.DT_Started),
MONTH(TourTbl.DT_Started)
order by dtYear asc, dtMonthno asc
now my result is :
count dtMonthno dtYear Row
6 5 2011 1
8 6 2011 2
2 7 2011 3
23 8 2011 4
126 9 2011 5
101 10 2011 6
85 11 2011 7
92 12 2011 8
115 1 2012 9
102 2 2012 10
48 3 2012 11
Is there any way to start the Row column depending on the dtMonthno and increment by one in the example above would start from 5 and end in 15?
Thanks

Answer 1

Try changing the derivation of Row to:
row_number() over (order by YEAR(TourTbl.DT_Started) asc,
MONTH(TourTbl.DT_Started) asc ) +
min(YEAR(TourTbl.DT_Started)*12+MONTH(TourTbl.DT_Started)-1) OVER () % 12 as Row

Answer 2

You can add month of first DT_Started date:
SELECT COUNT(*) as count,
MONTH(TourTbl.DT_Started) as dtMonthno,
DATENAME(YYYY, TourTbl.DT_Started) as dtYear,
row_number() over (order by DATENAME(YYYY, TourTbl.DT_Started) asc,
MONTH(TourTbl.DT_Started) asc )
+ substring(min(DATENAME(YYYY, [TourTbl].DT_Started) + right ('0' + str (MONTH([TourTbl].DT_Started), 2), 2)) over (), 5, 2) - 1 as Row
FROM TourTbl
INNER JOIN BranchTbl ON TourTbl.BranchID = BranchTbl.BranchID
INNER JOIN AgencyTbl on AgencyTbl.AgencyID = BranchTbl.AgencyID
WHERE Cancelled = 0 AND
(TourTbl.DT_Started >= '2010/03/15' and
TourTbl.DT_Started <= '2012/03/15') AND
AgencyTbl.AgencyID in ( 245 ) and
BranchRODID > 0
group by datename(M, TourTbl.DT_Started),
DATENAME(YYYY, TourTbl.DT_Started),
MONTH(TourTbl.DT_Started)
order by dtYear asc, dtMonthno asc

Answer 3

I would truncate the dates to months and group by those values, then obtain years, months and row numbers based on the truncated dates:
SELECT
COUNT(*) AS count,
MONTH(GroupMonth) AS dtMonthno,
DATENAME(YYYY, GroupMonth) AS dtYear, /* why do you want year as a string? */
ROW_NUMBER() OVER (ORDER BY GroupMonth) + MONTH(MIN(GroupMonth) OVER ()) - 1 AS Row
FROM (
SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, TourTbl.DT_Started), 0) AS GroupMonth
FROM TourTbl
INNER JOIN BranchTbl ON TourTbl.BranchID = BranchTbl.BranchID
INNER JOIN AgencyTbl on AgencyTbl.AgencyID = BranchTbl.AgencyID
WHERE Cancelled = 0 AND
(TourTbl.DT_Started >= '2010/03/15' and
TourTbl.DT_Started <= '2012/03/15') AND
AgencyTbl.AgencyID in ( 245 ) and
BranchRODID > 0
) s
GROUP BY GroupMonth