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Full Discussion: Assistance with an awk code to split files but keep the header
Top Forums Shell Programming and Scripting Assistance with an awk code to split files but keep the header Post 302880597 by Don Cragun on Friday 20th of December 2013 11:20:52 PM
Old 12-21-2013
Assuming that your field separator is a tab character and that SortCode fields with the same values are always adjacent, the following seems to do what you want:
Code:
awk -F '\t' '
NR == 1 {hdr = $0
        next
}
f != substr($2, 1, 6)".txt" {
        if(f) close(f)
        f = substr($2, 1, 6)".txt"
        print hdr > f
}
{       print >> f
}' workbook.txt

If you want to try this on a Solaris/SunOS system, use /usr/xpg4/bin/awk, /usr/xpg6/bin/awk, or nawk instead of awk.

With three more simple lines of code, it will handle cases where some input lines destined for one of the output files are not adjacent to the others.

Since your sample input file has fields separated by 4 spaces instead of by tabs, this script will not work with your sample input. To make it work with your sample input, change the 1st line of the script to:
Code:
awk -F '    ' '

To make the spacing clear (with each space character replaced by <space>) that is:
Code:
awk<space>-F<space>'<space><space><space><space>'<space>'

Note also that if the 2nd field starts with XX XX rather than XX XXX, your output filenames will not only have an embedded space character, they will also have a trailing space character. That trailing space could be easily eliminated using a different way to create the output filenames (and it would work with any combination of spaces and tabs as field separators).
This User Gave Thanks to Don Cragun For This Post:
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LEARN ABOUT OPENSOLARIS

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWgawk	      |
       +--------------------+-----------------+
       |Interface Stability | Volatile	      |
       +--------------------+-----------------+
NOTES

       Source for gawk is available on http://opensolaris.org.

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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