SELECT
tbPercentiles.percentile,
DpercentileExcel("costPerSize","qryCostPerSize",[percentile]) AS PercentileValueExcel,
Dpercentile("costPerSize","qryCostPerSize",[percentile]) AS PercentileValue
FROM
tbPercentiles
ORDER BY
tbPercentiles.percentile;
what is the Dpercentile in ur sql...