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Top Forums Shell Programming and Scripting Merge records based on multiple columns Post 302897644 by Ravi Agrawal on Tuesday 15th of April 2014 09:20:23 AM
Old 04-15-2014
Re:Merge records based on multiple columns

Hi,

I am not an expert shell scripting programmer ,but I have tried few options

1) For loop by reading each row and doing concatenated grep to find the matching column

2) I have also gone through the link (on this website itself )given below and tried to change given solution as per requirement


shell-programming-and-scripting
208027-merge-multiple-lines-same-file-common-key-using-awk.html

but ordering on the basis of 15th column is still an issue and also I am getting double quotes in concatenation of last field

I am ok with any solution being in KSH,BASH or AWK. Perl and any other language could be the last option but not preferable for now.

I am not sure about OS version too as I am out of my office and can't check

let me know if these informations are helpful
 

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paste(1)						      General Commands Manual							  paste(1)

Name
       paste - merge file data

Syntax
       paste file1 file2...
       paste -dlist file1 file2...
       paste -s [-dlist] file1 file2...

Description
       In  the	first  two forms, concatenates corresponding lines of the given input files file1, file2, etc.	It treats each file as a column or
       columns of a table and pastes them together horizontally (parallel merging).

       In the last form, the command combines subsequent lines of the input file (serial merging).

       In all cases, lines are glued together with the tab character, or with characters from an optionally specified  list.   Output  is  to  the
       standard output, so it can be used as the start of a pipe, or as a filter, if - is used in place of a file name.

Options
       -       Used in place of any file name, to read a line from the standard input.	(There is no prompting).

       -dlist  Replaces  characters  of  all but last file with nontabs characters (default tab).  One or more characters immediately following -d
	       replace the default tab as the line concatenation character.  The list is used circularly, i. e. when exhausted, it is reused.	In
	       parallel  merging  (i. e. no -s option), the lines from the last file are always terminated with a new-line character, not from the
	       list.  The list may contain the special escape sequences: 
 (new-line), 	 (tab), \ (backslash), and  (empty string, not a null
	       character).   Quoting  may  be  necessary,  if characters have special meaning to the shell (for example, to get one backslash, use
	       -d"\\" ).
	       Without this option, the new-line characters of each but the last file (or last line in case of the -s option) are  replaced  by  a
	       tab character.  This option allows replacing the tab character by one or more alternate characters (see below).

       -s      Merges  subsequent  lines  rather  than	one  from  each input file.  Use tab for concatenation, unless a list is specified with -d
	       option.	Regardless of the list, the very last character of the file is forced to be a new-line.

Examples
       ls | paste -d" " -
       list directory in one column
       ls | paste - - - -
       list directory in four columns
       paste -s -d"	
" file
       combine pairs of lines into lines

Diagnostics
       line too long
		 Output lines are restricted to 511 characters.

       too many files
		 Except for -s option, no more than 12 input files may be specified.

See Also
       cut(1), grep(1), pr(1)

																	  paste(1)
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