We have a large database with engineering data from a number of sensors. Some data is boolean, some is analog. The time base is generally 1 second, but can vary for several reasons, and may be as slow as 30 seconds between datapoints. There is a column Date_Time. I would like to develop a tool or tools to look at transitions in the data. We would like to count the number of transitions in the data table or in a timeframe. For example, the booleans should be fairly easy, we need to count the number of times in a day in which the data goes from 0 to 1. The analog data is more difficult. For example, we would want to know how many times a temperature changes from below 200C to above 700C. However, teh temperature ramp could take anywhere from 10 seconds to 10 minutes. If I simply look at cases in which the data is >700, and look back 10 minutes, then I will end up counting multiple (many) hits if the ramp was very steep, and may miss some slower ramps. How can I count each transition only once? Thanks Chuck
The question is not very clear (at least to me). is it possible to add some sample data along with the table structure?
