daff on same file and highlight

[gk7279]

Hi-

Let's say I only have 1 file.

#cat ip.csv name,age,height,id,sex abc,12,6,7,m abc,13,6,7,m def,13,7,8,f ghi,15,6,7,m

#cat op.csv name,age,height,id,sex abc,12,6,7,m abc, $\color{red}{13}$ ,6,7,m def,13,7,8,f ghi,15,6,7,m

The logic is to use the "name" column as the key and see if we can match all the other columns against the duplicate record.