I’d would like to complete my first paper in latex and I’m confused by ways how I could add row number for different table and restart the counter for the next table.

One of my ways is using this macro:

pretotabular{setcounter{magicrownumbers}{0}}
newcounter{magicrownumbers}
newcommandrownumber{stepcounter{magicrownumbers}arabic{magicrownumbers}}

I used it for my table:

    begin{tabular*}{tblwidth}{@{makebox[3em][r]{rownumberspace}}  L p{2.2cm} p{2cm} p{1cm}   p{1cm}  p{1.2cm}  p{1.2cm}  p{1.4cm}  p{1.2cm}  }
caption{My caption} label{Tab:mylable}
small
begin{tabular*}{tblwidth}{@{makebox[3em][r]{rownumberspace}}  L p{2.2cm} p{2cm} p{1cm} p{1cm}  p{1.2cm}  p{1.2cm}  p{1.4cm}  p{1.2cm}  }
toprule
 # & Dataset & Subject Area &  # of feat. & # of inst. & # of classes & # of mis. val. & # of num. attr. & # of cat. attr.   \
midrule
& Analcatdata asbestos  & Life science  & 4 & 83 & 2 & 0 & 1& 3 \
& BreastTumor & Health & 10  & 286 & 2 & 9 & 1 & 9 \
 end{tabular*}
end{table}

The row numbers are displayed the first column but how could I remove it from the toprule (first row)?
For resetting the rownum for the next table, should I use this cod?

setcounter{rownum}{0}