Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to do row comparison in shell script
Top Forums Shell Programming and Scripting How to do row comparison in shell script Post 302351969 by informsrini on Thursday 10th of September 2009 05:14:53 AM
Old 09-10-2009
How to do row comparison in shell script
Hi,

I need help on doing the below thing in shell script.

I have a file with millions of rows called "abc.txt". i have another file with millions of rows called "xyz.txt".

I would like to do the below operation.
Open the abc.txt, read the first line, do some operations on the column values and hold it in temp variable. Open the the xyz.txt and read the first line and do some operations on the column values and hold it in temp variables.
Write this temp values to the output file.
The major hiccups in this is i have to compare the first row of abc.txt with the first row of xyz.txt and second row to the second row and so on.

How can i do the comparison of first line with first line and second line with second line and so on ?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Help with time comparison shell script for HP-UX

I am using Korne Shell in HP-Ux. Can someone give me and idea on how I can write a shellscript on how to do this please:- On our HP-UX server, a batch file is run every evening at about 6:30pm. The first step of this batch file will touch an empty "flag" file to indicate that the batch has... (6 Replies)
Discussion started by: gummysweets
6 Replies

2. Shell Programming and Scripting

consecutive row comparison in awk (?)

hi, I'm totally new to this forum and to awk. I have what I thought was a simple problem, but I can't get anything to work. Here is an example input file: 3.85 4018.4 3.9 4068.4 3.95 4082.9 4 4099.7 # Property:.......etc. 0 4733.3 0.05 4659.7 0.1 4585.6 0.15 4466.2 Two... (2 Replies)
Discussion started by: ogga
2 Replies

3. Shell Programming and Scripting

bash shell script string comparison

I want to remove a line that has empty string at second field when I use cut with delimeter , like below $cat demo hello, mum hello, #!/bin/sh while read line do if then # remove the current line command goes here fi done < "demo" i got an error message for above... (4 Replies)
Discussion started by: bonosungho
4 Replies

4. Shell Programming and Scripting

Sequential comparison (one row with file and so on)

Dear linux experts, I'd like to ask for your support, I've read some posts in this forum about files comparison but haven't found what I'm looking for. I need to create a sequential script to compare row-by-row one file with 34 similar files but without success so far. This is what I get: ... (2 Replies)
Discussion started by: Gery
2 Replies

5. Shell Programming and Scripting

need help in writing a comparison shell script

I have a folder a1 with the following files sample_1.log sample_2.log sample_3.log sample_4.log sample_5.log sample_6.log In another folder there is a file b with the value 5 My script should take the value 5 ( file b), compare it with the files in folder a1, if file name contains... (1 Reply)
Discussion started by: Nagesh1
1 Replies

6. Solaris

String Comparison in Shell script

I Have a script which gets the status of oracle database and if the status is READ WRITE ..it should echo "db is up " else "db is down" Here is the code if then echo "db up" else echo "db down" fi done; The script is giving me out put "db down" even thoug the value of... (6 Replies)
Discussion started by: njafri
6 Replies

7. Shell Programming and Scripting

row Comparison

(5 Replies)
Discussion started by: number10
5 Replies

8. Shell Programming and Scripting

File comparison in shell script

Hi, I have written one script : #!/bin/bash echo -n -e "\nEnter how many files : " read no for (( j=1; j<=$no; j++ )) do echo -n -e "\nEnter $j File name : " read name done for (( j=1; j<=$no; j++ )) do FILE=`find ./ -type f -name "${name}"` echo "$FILE" (3 Replies)
Discussion started by: kiran_j
3 Replies

9. Shell Programming and Scripting

Korn shell script comparison

I have a scenario to implement in Korn shell script. Here it is.. I need to compare two values to see whether they are same or not. The issue is that the values coming in for comparison can be a string or an integer which can be determined during run time only. Which korn shell comparison... (1 Reply)
Discussion started by: vani123
1 Replies

10. UNIX for Dummies Questions & Answers

Shell Script: Traverse Database Table Row by Row

Hello Everyone, My issue is that I want to traverse a database table row by row and do some action on the value retrieved in each row. I have gone through a lot of shell script questions/posts. I could find row by row traversal of a file but not a database table. Please help. Thanks &... (5 Replies)
Discussion started by: ahsan.asghar
5 Replies

LEARN ABOUT DEBIAN

psc

PSC(1)							      General Commands Manual							    PSC(1)

NAME

       psc - prepare sc files

SYNOPSIS

       psc [-fLkrSPv] [-s cell] [-R n] [-C n] [-n n] [-d c]

DESCRIPTION

       Psc  is used to prepare data for input to the spreadsheet calculator sc(1).  It accepts normal ascii data on standard input.  Standard out-
       put is a sc file.  With no options, psc starts the spreadsheet in cell A0.  Strings are right justified.  All data on a line is entered	on
       the  same row; new input lines cause the output row number to increment by one.	The default delimiters are tab and space.  The column for-
       mats are set to one larger than the number of columns required to hold the largest value in the column.

OPTIONS

       -f     Omit column width calculations.  This option is for preparing data to be merged with an existing spreadsheet.  If the option is  not
	      specified, the column widths calculated for the data read by psc will override those already set in the existing spreadsheet.

       -L     Left justify strings.

       -k     Keep  all  delimiters.   This  option  causes the output cell to change on each new delimiter encountered in the input stream.   The
	      default action is to condense multiple delimiters to one, so that the cell only changes once per input data item.

       -r     Output the data by row first then column.  For input consisting of a single column, this option will result in  output  of  one  row
	      with multiple columns instead of a single column spreadsheet.

       -s cell
	      Start  the  top  left  corner  of the spreadsheet in cell.  For example, -s B33 will arrange the output data so that the spreadsheet
	      starts in column B, row 33.

       -R n   Increment by n on each new output row.

       -C n   Increment by n on each new output column.

       -n n   Output n rows before advancing to the next column.  This option is used when the input is  arranged  in  a  single  column  and  the
	      spreadsheet is to have multiple columns, each of which is to be length n.

       -d c   Use the single character c as the delimiter between input fields.

       -P     Plain numbers only.  A field is a number only when there is no imbedded [-+eE].

       -S     All numbers are strings.

       -v     Print the version of psc

SEE ALSO

       sc(1)

AUTHOR

       Robert Bond

PSC 7.16							 19 September 2002							    PSC(1)
All times are GMT -4. The time now is 06:27 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy