Use [`increase()`](/flux/v0/stdlib/universe/increase/)
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.

```js
data
    |> increase()
```

`increase()` returns a cumulative sum of **non-negative** differences between rows in a table.
For example:

{{< flex >}}
{{% flex-content %}}
**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      |
{{% /flex-content %}}
{{% flex-content %}}
**`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     |
{{% /flex-content %}}
{{< /flex >}}