Convert character string to uppercase characters. This does not affect non-alpha characters outside the 26 alphabets.
Convert the values in column from lowercase to uppercase.
$ more dat1.csv id,str 1,abc 2,Ab$12!cD 3, 4,Cba $ mcal c='toupper($s{str})' a=rsl i=dat1.csv o=rsl1.csv #END# kgcal a=rsl c=toupper($s{str}) i=dat1.csv o=rsl1.csv $ more rsl1.csv id,str,rsl 1,abc,ABC 2,Ab$12!cD,AB$12!CD 3,, 4,Cba,CBA