How to compare two flat files in unix

Apart from the comm and diff solution you could use grep for this. Assuming your relevant data is columns 1,3, and 10 in file A and 1,2, and 3 in file B. We use cut to select the columns from A, use this as the keyword match file and reverse check their presence in file B. If file B has a line not present in the matching lines extracted from file A, they will be displayed.

If all match, there is no output since B supposedly is a subset of A. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Learn more. Asked 5 years, 2 months ago. Active 5 years, 2 months ago. Viewed times. Improve this question. Administrator Emeritus. Join Date: Aug HI, The diff command will list both the file content indicating where exactly the data are changed or there is a difference.

By this data we need to format and getonly the changed data in second file, can you let me know how to do it With regds Shashi. Compare files to pull changed records only. I have two fixed width files shown below. I am trying to find the changes in the records in the Newfile. The first column is a key column example: A If there are any new or deletion of records in the Compare data in two files.

Gents, Can you help please I have a data base with lot information file2 and I have some data in file1 to compare. Compare to flat files using awk. Compare two flat files and update one based on the values in the other. Hi, I'm a newbie to scripting and am trying to compare two files using awk. The files are exactly the same dimensions. Where the first file has 0's I would like to create an updated version of the second file which has the corresponding elements set to zero also.

Where the first file has 0's I would like to create an updated version of the second file which has the corresponding elements set to zero also. Require compare command to compare 4 files. I have four files, I need to compare these files together. As such i know "sdiff and comm" commands but these commands compare 2 files together. If I use sdiff command then i have to compare each file with other which will increase the codes. Please suggest if you know some commands whcih can Hello, I am strugling from quite a some time to compare flat files with over 1 million records could anyone please help me.

I want to compare two pipe delimited flat files, file1 with file2 and output the unmatched rows from file2 in file3 Sample File Hi Frnds, I have a flat file with millions of records. Now I on this. I prefer for AWK as its gives good performance.

I have a pre-configured file contains a list of paths to executables and i need to check against the UNIX directory structure. How to compare two flat files and get changed data. In flat file i dont have data column or anything its just a string data in flat file. Can any one please let me know the script With Regds Shashi 3 Replies. Hi Frnds, I have a flat file with millions of records. Now I on this. I prefer for AWK as its gives good performance. Reason: cr. Join Date: May Code:- Code :.

Code :. Join Date: Oct I think it wouldn't barf on big files unless there are too many lines between diffs. Example, this will show You the lines that does not exist in both files: Code :. Originally Posted by Lakris. Join Date: Apr It is faster than awk. Last edited by ; at AM.. I hope I had clear the issue.

Join Date: Jun Converting Multiline Files to Flat Files? Compare to flat files using awk.