# Thresholds

{% hint style="success" %}
Run this example using its test data from within [FlightPath Data](https://www.flightpathdata.com/).
{% endhint %}

```
~
 This csvpath finds all the new high-value thresholds in a CSV file.
 It gives the same output as this SQL:

    SELECT
       id,
       worker_hours_this_period
    FROM(
       SELECT
          id,
          worker_hours_this_period,
          MAX(worker_hours_this_period)
  	 OVER (ORDER BY id ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING) AS max_prev_value
       FROM
          projects
     ) AS subquery
    WHERE
       worker_hours_this_period > max_prev_value OR max_prev_value IS NULL;

 id: New high value
 test-data: examples/headers/projects_with_reset.csv
~
$[1*][
    @hours.onchange.increase = float(#worker_hours_this_period)

    print.onmatch("line: $.csvpath.line_number: $.variables.hours")
]

```


---

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