Sort command in not working properly in unix for sorting a csv file

Question

I have a csv file which I need to order based on the timestamp. It is the third column in the csv and I am using below commands to sort:

awk \'NR<2{print $_;n         


        

Answer 1

Try this:

sort -rft',' -k3 merged.csv

Answer 2

The below should work

 awk 'NR<2{print $_;next}{ print $_ | "sort -t, -k3.8,3.11rn -k3.1,3.3rM -k3.5,3.6rn -k3.12rd" }'

The 'awk' snippet passes all lines except header to the sort command. The order of the keys is important here :

k3.8,3.11rn extracts the year part of the column and reverse sorts

k3.1,3.3rM extracts the first 3 characters in column three to be reverse monthly sorted and the rest we do a reverse dictionary sort

k3.5,3.6rn extracts the day and reverse sort and finally we do the same for time

Answer 3

I will try to sort by date and then by time

awk -F"," '{print $3,$1,$2}' file.csv | sort -d' ' -k 1d -k 2d

BTW, it would be great if you just share a small section of your file. :)