 same subset as above (the "as" is optional):</h3>
<li>:,: { [:,"colname1"] > minval1 and [:,"colname1"] < maxval1 and [:,"colname2"] > minval2 and [:,"colname2"] < maxval2 }/agg:mean(:,"colname3") as "my mean"</li>

<h3>Return min and max for column "colname3" for same subset:</h3>
<li>:,: { [:,"colname1"] > minval1 and [:,"colname1"] < maxval1 and [:,"colname2"] > minval2 and [:,"colname2"] < maxval2 }/agg:min(:,"colname3") as "my min", max(:,"colname3") as "my max"</li>
