  The SDSS Data Release 1 includes 1833 DA white dwarfs (WDs) and forms the
largest homogeneous sample of WDs. This sample provides the best opportunity to
study the statistical properties of WDs. We adopt a recently established
theoretical model to calculate the mass and distance of each WD using the
observational data. Then we adopt a bin-correction method to correct for
selection effects and use the 1/V weight-factor method to calculate the
luminosity function, the continuous mass function and the formation rate of
these WDs. The SDSS DA WD sample is incomplete and suffers seriously from
selection effects. After corrections for the selection effects, only 531 WDs
remain. From this final sample we derive the most up-to-date luminosity
function and mass function, in which we find a broad peak of WD masses centered
around 0.58$M_{\odot}$. The DA WD space density is calculated as
$8.81\times10^{-5}pc^{-3}$ and the formation rate is $2.579\times
10^{-13}pc^{-3}yr^{-1}$. The statistical properties of the SDSS DA WD sample
are generally in good agreement with previous observational and theoretical
studies, and provide us information on the formation and evolution of WDs.
However, a larger and more complete all-sky WD sample is still needed to
explain some subtle disagreements and unresolved issues.
