Calculate the increase
Use the increase() function
to track increases across multiple columns in a table.
This function is especially useful when tracking changes in counter values that
wrap over time or periodically reset.
data
|> increase()increase() returns a cumulative sum of non-negative differences between rows in a table.
For example:
Given the following input:
| _time | _value |
|---|---|
| 2020-01-01T00:01:00Z | 1 |
| 2020-01-01T00:02:00Z | 2 |
| 2020-01-01T00:03:00Z | 8 |
| 2020-01-01T00:04:00Z | 10 |
| 2020-01-01T00:05:00Z | 0 |
| 2020-01-01T00:06:00Z | 4 |
increase() returns:
| _time | _value |
|---|---|
| 2020-01-01T00:02:00Z | 1 |
| 2020-01-01T00:03:00Z | 7 |
| 2020-01-01T00:04:00Z | 9 |
| 2020-01-01T00:05:00Z | 9 |
| 2020-01-01T00:06:00Z | 13 |
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