% This file is embedded in datatool-user.pdf version 3.1 2025-03-10
% Example 82 Display Data in a Stripy Table
% Label: "ex:displaydbstripytable"
% arara: pdflatex
% arara: pdfcrop
\documentclass[12pt]{article}
\pagestyle{empty}
 \begin{filecontents}[noheader,overwrite]{studentmarks.csv}
Surname,Forename,StudentNo,Assign1,Assign2,Assign3
"Smith, Jr",John,102689,68,57,72
"Brown",Jane,102647,75,84,80
"Brown",Jane,102646,64,92,79
"Brown",Andy,103569,42,52,54
"Adams",Zoë,105987,52,48,57
"Brady",Roger,106872,68,60,62
"Verdon",Clare,104356,45,50,48
\end{filecontents}

\usepackage{colortbl}
\usepackage{datatool}
\DTLsetup{store-datum,default-name=marks}
\DTLread{studentmarks.csv}
\ExplSyntaxOn
\RenewDocumentCommand \DTLdisplaydbAddItem { m m m m m m m m }
{
 \int_compare:nNnT { #7 } = { \c_one_int }
 { % first column
   \int_if_odd:nTF { #5 }
  { % odd row
   \tl_put_right:Nn #1 { \rowcolor { blue } }
  }
  { % even row
   \tl_put_right:Nn #1 { \rowcolor { green } }
  }
  }
 \tl_put_right:Nn #1 { #3 { #2 } }
}
\ExplSyntaxOff 
\begin{document}
\DTLaction{display} 
\end{document}