Compare 2 flat files


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Compare 2 flat files
# 1  
Compare 2 flat files

Hi Gurus,

I searched the forum but didnt get much info.
I want to compare 2 files.

1)Newfile comes today with
2)Old file of previous day.

The files are same ,just the new files might have new records sometimes.

So I want to capture these new records in another file.

Can anyone help me in this ??

Thanks
# 2  
If all you just want is a file containing the differences between your old and new files then try:
Code:
diff old_file new_file > diff_file

lines only in new_file will be preceded by >
# 3  
thanks for reply but I guess using diff will also give the records which are present in old file and not in new file.

I just want to capture the records not present in old file and present in new file.
# 4  
The following should work:
Code:
diff old_file new_file | grep ">" | cut -b 3- > new_records.txt

grep entries that are in the newer file only, and cut the first two leading chars that diff outputs.

Records that are in the old file only will not be in the new one.
# 5  
Quote:
Originally Posted by ganesh123
Hi Gurus,

I searched the forum but didnt get much info.
I want to compare 2 files.

1)Newfile comes today with
2)Old file of previous day.

The files are same ,just the new files might have new records sometimes.

So I want to capture these new records in another file.

Can anyone help me in this ??

Thanks
If you are on solaris, you can use:

/usr/xpg4/bin/grep -v -f oldfile newfile > diff_file
# 6  
Thankyou everybody for your precious time.
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #235
Difficulty: Easy
The ARPANET was operated by the military during the two decades of its existence, until 1990.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Converting Multiline Files to Flat Files?

How to convert this: F1-R1 F1-R2 F1-R3 into a flat file for bash?? Each record F2-R1 F2-R2 F2-R3 F3-R1 F3-R2 F3-R3 F4-R1 F4-R2 F4-R3is on one line with all fields for that record, put into an output file. The output file should look like this when converted: F1-R1,F2-R1,F3-R1,F4-R1... (6 Replies)
Discussion started by: bud1738
6 Replies

2. Shell Programming and Scripting

Compare to flat files using awk

compare to flat files using awk .but in 4th field contains non ordered substring. how to do that. file1.txt john|0.0|4|**:25;JP:50;UY:25 file2.txt andy|0.0|4|JP:50;**:25;UY:25 (4 Replies)
Discussion started by: veeruasu
4 Replies

3. UNIX for Dummies Questions & Answers

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. eg: file1: 12345 1 2 0... (3 Replies)
Discussion started by: kasan0
3 Replies

4. Shell Programming and Scripting

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... (6 Replies)
Discussion started by: nehashine
6 Replies

5. Shell Programming and Scripting

awk to compare flat files and print output to another file

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 File1: ... (9 Replies)
Discussion started by: suhaeb
9 Replies

6. Shell Programming and Scripting

Compare 2 flat files

Hi Frnds, I have a flat file with millions of records. . Now I on this. (I prefer for AWK as its gives good performance.) Old_file.txt ------------------ 1 gopi ase . 2 arun pl 3 jack sutha .. 4 peter pm .. New_file.txt --------------- 4 peter pm .. .. ... (12 Replies)
Discussion started by: Gopal_Engg
12 Replies

7. Programming

compare XML/flat file with UNIX file system structure

Before i start doing something, I wanted to know whether the approach to compare XML file with UNIX file system structure. I have a pre-configured file(contains a list of paths to executables) and i need to check against the UNIX directory structure. what are the various approches should i use ? I... (6 Replies)
Discussion started by: shafi2all
6 Replies

8. Shell Programming and Scripting

How to compare two flat files and get changed data

Hi, I need to compare two flat files (yesterday & today's data) and get only the changed data from flat files. 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)
Discussion started by: jtshashidhar
3 Replies

9. Shell Programming and Scripting

How to compare data in two flat files and update them?

Hi All, I am giving an example similar to the problem I have. I have two data files of 10 columns each in which fields are delimited by comma(,). I need to compare compare the two files using the uniq col(col3). If there are any records in file1 and are not in file2 then I have check the value... (3 Replies)
Discussion started by: rajus19
3 Replies

10. Shell Programming and Scripting

Flat Files

I have a flat file like this 0001 THER ULT HEAD & NECK VES 0002 THER ULTRASOUND OF HEART 0003 THER ULT PERIPHERAL VES 0009 OTHER THERAPEUTIC ULTSND 0010 IMPLANT CHEMOTHERA AGENT 0011 INFUS DROTRECOGIN ALFA 0012 ADM INHAL NITRIC OXIDE I need to conver this to a comma delimited flat file... (2 Replies)
Discussion started by: thumsup9
2 Replies

Featured Tech Videos