\documentclass{article}
\usepackage{datatool}
\usepackage{siunitx}
\usepackage{xcolor}
\usepackage{colortbl}
%% table data
\begin{filecontents*}{scientists.csv}
name,surname,age,IQ
Albert,Einstein,133,210.12
Marie,Curie,145,220.12
\end{filecontents*}
%% table design
\colorlet{tableheadcolor}{black!60}
\newcommand\tableheadfont{%
\sffamily\bfseries
\slshape
\color{white}
}
\begin{document}
\DTLloaddb{table}{scientists.csv}
\sisetup{round-mode=places,
table-number-alignment = center-decimal-marker