SQL Comparison to a value in the next row - compare

Question

I have been a long time reader of this forum, it has helped me a lot, however I have a question which I cant find a solution specific to my requirements, so this is the first time I have had to ask anything.
I have a select statement which returns meter readings sorted by date (the newest readings at the top), in 99.9% of cases the meter readings always go up as the date moves on, however due to system errors occasionally some go down, I need to identify instances where the reading in the row below (previous reading) is GREATER than the latest reading (Current cell)
I have come across the LEAD function, however its only in Oracle or SS-MS-2012, I'm using SS-MS-2008.
Here is a simplified version of my select statment:
SELECT Devices.SerialNumber,
MeterReadings.ScanDateTime,
MeterReadings.TotalMono,
MeterReadings.TotalColour
FROM dbo.MeterReadings AS MeterReadings
JOIN DBO.Devices AS Devices
ON MeterReadings.DeviceID = Devices.DeviceID
WHERE Devices.serialnumber = 'ANY GIVEN DEVICE SERIAL NUMBER'
AND Meterreadings.Scandatetime > 'ANY GIVEN SCAN DATE TIME'
ORDER BY MeterReadings.ScanDateTime DESC, Devices.SerialNumber ASC

Answer 1

This is the code I used in the end
WITH readings AS
(
SELECT
d.SerialNumber
, m.TotalMono
, m.TotalColour
, m.ScanDateTime
FROM dbo.MeterReadings m
INNER JOIN dbo.Devices d ON m.DeviceId = d.DeviceId
WHERE m.ScanDateTime > '2012-01-01'
)
SELECT top 1 *
FROM readings r
LEFT JOIN readings p ON p.SerialNumber = r.SerialNumber
and p.ScanDateTime < r.ScanDateTime
and p.TotalMono > r.TotalMono
order by r.serialnumber, p.TotalMono desc, r.TotalMono asc

Answer 2

Try something like this.
;WITH readings AS
(
SELECT
d.SerialNumber
, m.TotalMono
, m.TotalColour
, m.ScanDateTime
FROM dbo.MeterReadings m
INNER JOIN dbo.Devices d ON m.DeviceId = d.DeviceId
)
SELECT *
FROM readings r
LEFT JOIN readings p ON p.SerialNumber = r.SerialNumber
AND p.ScanDateTime < r.ScanDateTime
WHERE p.reading > r.reading