SHELL

awk lowercase

echo EXAMPLE | awk -F 'd' '{ print tolower($1)}'
example		#Example first lowercased outputed

make everything uppercase or lowercase awk

tolower($0) 
toupper($0)

a="UPPER CASE"
echo "$a" | awk '{print tolower($0)}'

awk '{print tolower($0)}' data.csv

$0 to print everything