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Full Discussion: sort script
Top Forums Shell Programming and Scripting sort script Post 302713523 by jim mcnamara on Wednesday 10th of October 2012 11:42:27 PM
Old 10-11-2012
IMO: your idea lacks merit.

You should simply insert the data into a db with a loader, then produce output. If you have Excel you have MS office and probably a db like Access. UNIX has free db's: mysql, Berekely db, etc.

So, Why does your idea look like reinventing the wheel?

The reason is that Don Cragun is right. You have to have complete metadata for each and every column to be able to sort based on arbitrary column selections. And there is too much metadata to cobble together anything useful in shell. Metadata can change. db's are meant for that contingency.

The way it is now, you have to know what you are sorting by looking at it - in effect gathering metadata. You have to use human intelligence to make decisions. Then use unix sort/Excel sort. Databases are meant to do this. You just tell db's to sort on column names, optionally: ascending or descending for each column. You can write database scripts (SQL language for example) to do stats or a lot of what you already can do in Excel.

So, stay in Excel or move to a db. I vote for a db.
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Excel(3pm)						User Contributed Perl Documentation						Excel(3pm)

NAME
DBD::Excel - A class for DBI drivers that act on Excel File. This is still alpha version. SYNOPSIS
use DBI; $hDb = DBI->connect("DBI:Excel:file=test.xls") or die "Cannot connect: " . $DBI::errstr; $hSt = $hDb->prepare("CREATE TABLE a (id INTEGER, name CHAR(10))") or die "Cannot prepare: " . $hDb->errstr(); $hSt->execute() or die "Cannot execute: " . $hSt->errstr(); $hSt->finish(); $hDb->disconnect(); DESCRIPTION
This is still alpha version. The DBD::Excel module is a DBI driver. The module is based on these modules: * Spreadsheet::ParseExcel reads Excel files. * Spreadsheet::WriteExcel writes Excel files. * SQL::Statement a simple SQL engine. * DBI Of course. :-) This module assumes TABLE = Worksheet. The contents of first row of each worksheet as column name. Adding that, this module accept temporary table definition at "connect" method with "xl_vtbl". ex. my $hDb = DBI->connect( "DBI:Excel:file=dbdtest.xls", undef, undef, {xl_vtbl => {TESTV => { sheetName => 'TEST_V', ttlRow => 5, startCol => 1, colCnt => 4, datRow => 6, datLmt => 4, } } }); For more information please refer sample/tex.pl included in this distribution. Metadata The following attributes are handled by DBI itself and not by DBD::Excel, thus they all work like expected: Active ActiveKids CachedKids CompatMode (Not used) InactiveDestroy Kids PrintError RaiseError Warn (Not used) The following DBI attributes are handled by DBD::Excel: AutoCommit Always on ChopBlanks Works NUM_OF_FIELDS Valid after "$hSt->execute" NUM_OF_PARAMS Valid after "$hSt->prepare" NAME Valid after "$hSt->execute"; undef for Non-Select statements. NULLABLE Not really working, always returns an array ref of one's. Valid after "$hSt->execute"; undef for Non-Select statements. These attributes and methods are not supported: bind_param_inout CursorName LongReadLen LongTruncOk Additional to the DBI attributes, you can use the following dbh attribute: xl_fmt This attribute is used for setting the formatter class for parsing. xl_dir This attribute is used only with "data_sources" on setting the directory where Excel files ('*.xls') are searched. It defaults to the current directory ("."). xl_vtbl assumes specified area as a table. See sample/tex.pl. xl_skiphidden skip hidden rows(=row height is 0) and hidden columns(=column width is 0). See sample/thidden.pl. xl_ignorecase set casesensitive or not about table name and columns. Default is sensitive (maybe as SQL::Statement). See sample/thidden.pl. Driver private methods data_sources The "data_sources" method returns a list of '*.xls' files of the current directory in the form "DBI:Excel:xl_dir=$dirname". If you want to read the subdirectories of another directory, use my($hDr) = DBI->install_driver("Excel"); my(@list) = $hDr->data_sources( { xl_dir => '/usr/local/xl_data' } ); list_tables This method returns a list of sheet names contained in the $hDb->{file}. Example: my $hDb = DBI->connect("DBI:Excel:file=test.xls"); my @list = $hDb->func('list_tables'); TODO
More tests First of all... Type and Format The current version not support date/time and text formating. Joins The current version of the module works with single table SELECT's only, although the basic design of the SQL::Statement module allows joins and the likes. KNOWN BUGS
o There are too many TODO things. So I can't determind what is BUG. :-) AUTHOR
Kawai Takanori (Hippo2000) kwitknr@cpan.org Homepage: http://member.nifty.ne.jp/hippo2000/ (Japanese) http://member.nifty.ne.jp/hippo2000/index_e.htm (English) Wiki: http://www.hippo2000.net/cgi-bin/KbWiki/KbWiki.pl (Japanese) http://www.hippo2000.net/cgi-bin/KbWikiE/KbWiki.pl (English) SEE ALSO
DBI, Spreadsheet::WriteExcel, Spreadsheet::ParseExcel, SQL::Statement COPYRIGHT
Copyright (c) 2001 KAWAI,Takanori All rights reserved. You may distribute under the terms of either the GNU General Public License or the Artistic License, as specified in the Perl README file. perl v5.8.8 2008-03-01 Excel(3pm)
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