|
|
Posted by iamonthisboat on 12/21/05 23:27
I have a data set like so:
UTC_TIME Timestamp NodeID Message Flag
Line
Station
11/19/2005 10:45:07 1132397107.91 1 3 5 1028
1034
11/3/2005 21:05:35 1131051935.20 2 3 5 1009
1043
11/25/2005 21:12:16 1132953136.59 3 3 5 1037
1049
I added the UTC_TIME column in as aconversion of the unix timestamp in
the TIMESTAMP column.
Keeping things simple and straightforward, I need to be able to
calculate the difference from one record to the next (ordered by
TIMESTAMP or UTC_TIME) and output the result into another column in the
table.
NODEID is the unique id.
First, what is the function to do so if, say, I only wanted to
calculate the difference between 2 records as just a basic SELECT
statement. That way I can answer quick question based on any one or two
NODEID's.
Second, how would I further that to continually calculate (as stated
above)?
WOuld this be a stored procedure? A trigger? A cursor?
I am learning as I go here. Any help is greatly appreciated.
R.
Navigation:
[Reply to this message]
|