How to compare two files using AWK Stack Overflow?

How to compare two files using AWK Stack Overflow?

I’m trying to compare two different files, let’s say “file1” and “file2”, in this way. If fields $2 and $3 are the same in both files, print $0 of file2. Here’s an example:

What to do if two columns in two files are the same?

If fields $2 and $3 are the same in both files, print $0 of file2. Here’s an example: Notice that all couples $2,$3 in file1 are contained in file2 and the number of rows of the output file is the same of file1. There are a lot of questions with similar problems, I know that, but all the answers were not useful.

What’s the difference between rows in column 1?

For column 1, difference between rows ‘six and seven’ and ‘eight and seven; is greater than 50 and hence keep them. So, my desired output will be

How to print the values of an array in AWK?

The two-dimensional array named students is declared in this example that contains three elements. Here, student id and name are used as key values of the array. Like the previous example, for-in loop is used in the awk script to print the values of the array. Run the following script from the terminal.

How is for-in loop used in AWK script?

Like the previous example, for-in loop is used in the awk script to print the values of the array. Run the following script from the terminal. Any value of the array can be deleted based the key value. Here, book array with three elements is defined in the beginning of the script. Next, the value of the key HTML is deleted by using delete command.

How to use array in awk command – Linux hint?

The output shows that the value of HTML index is empty after executing delete command. In the previous examples, the array is declared in the awk command and iterated by for-in loop. But you can read any bash array by awk script. In this example, a bash array named lang is declared in the first command.

Is it safe to use Grep and AWK together?

You should never see someone using grep and awk together because whatever grep can do, you can also do in awk: I had to get that off my chest. Now to your problem… Awk is a programming language that assumes a single loop through all the lines in a set of files.

What do you need to know about AWK programming?

Awk is a programming language that assumes a single loop through all the lines in a set of files. And, you don’t want to do this. Instead, you want to treat B.txt as a special file and loop though your other files. That normally calls for something like Python or Perl.

When to use = instead of = in AWK?

Beside of the problem you had in your awk command using = instead of == for comparison that Kusalananda pointed that. What I understood from your input and the command you are using, you want those line when at least one of those are zero).

When do you not need print$ 0 in AWK?

The { print $0 } is not needed as this is the default action for any condition that does not have an action. If you just want to skip lines with the same values in column one and two (gives the same output for the given data):

How to add more criteria to AWK table?

You don’t need to use OR between the two you can even add more criteria just add them each on a separete line save it in a textfile eg ‘criteria.awk’ and run it like this : awk -f criteria.awk table.dat Thanks for contributing an answer to Unix & Linux Stack Exchange!

Which is the fastest way to compare two files?

However, it would read the whole of file1 first and put it in memory.. It seems like it will work well enough and was the fastest of the methods that worked. This suggestion of RudiC also worked but was marginally slower.