Maximum Value of Cluster

First, let me describe my problem:

I'm trying to create a query within a database that will output the average of the three hottest consecutive days within a certain water year. The data is being pulled from a set of temperature loggers that record temperature every 15minutes.

My tentative solution:


1. Since I'm pulling data for a specific site, out of a database made of many sites, I first need to select the site. Duh.

2. Select Water Year.

3. Select the hottest temperature within each day. IE, somewhere around 2 oclock, per day.

3. Calculate degree days (simply the cumulative temperature at the site)

4. Determine largest change in a three day span, within the degree day data set.

5. Select that period with the greatest change.

6. Average Temperatures.

7. Celebrate?


Conclusion:
So, while I think that should work, I have a feeling it may not be the most efficient solution. If any of you have any suggestions or comments, I'd be very grateful to hear them. Specifically, if anyone can comment on how a SQL Query for the highest rate-of-change within a 3 day period, and how that would look, I'd be eternally grateful!

Thanks in advance!
Jacques
 

fresh_42

Mentor
Insights Author
2018 Award
10,721
7,332
This question cannot be answered without knowledge of the table structures and how you define "hottest" among 96 temperature data a day.
 

Want to reply to this thread?

"Maximum Value of Cluster" You must log in or register to reply here.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top