How to run two function in single query?

[geetanjali]

hi,

I want to display sum of latest values in "SingleValue" module. what would be my query?
i am using :-

<module name="HiddenSearch" layoutPanel="panel_row2_col1" autoRun="True">
    <param name="search">index="test" sourcetype="power_usage" | chart sum(Power_consumption) as Total(W)  </param>
          <module name="SingleValue">
            <param name="beforeLabel">現在の消費電力： </param>
            <param name="format">results</param>
            <param name="afterLabel">（W）</param>
          </module>
    </module> 

This module will return over all sum of power consumption. I want to sum only latest values.

like : sum(first(Power_consumption))

How could i update my query?

Please help.

thanks in advance

[hjwang]

The last function just only return last seen value of your specified field. Or you wanna sum(Power_consumption) during the specified time period, if so, you can add earliest=-1h latest=now in your search string.