I'm stuck in writing problems.

[JoHn-Beer]

Hi All,
I want to write a script in Meta Data Source.What I Want
I want to get the last value of every 30 days, for example
2019-01-01 8:00 to 2019-01-02 8:00 equals 1 day
...
2019-01-30 8:00 to 2019-01-31 8:00 equals 1 day
And I will make all the values together.But I don't know how to write the script as I need them.help me please

[phildunlap]

Hi JoHn-Beer,

It sounds like a time to use the PointValueQuery.

var endDate = CONTEXT.getTimestamp();
var startDate = endDate - CONTEXT.millisInPast(DAY, 30); //handles DST shenanigans
var results = [];
var callback = function(idValueTime) {
  results.push(idValueTime);
};
var pointsToQuery = [ p1.getDataPointWrapper().getId() ];
PointValueQuery.rollupQuery( pointsToQuery, startDate, endDate, callback, LAST, 1, DAY);
print(results);
//Do want you want now with the results, or in the callback function

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