Fix some whitespace.
[usenet/newsstats.git] / bin / groupstats.pl
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1#! /usr/bin/perl
2#
3# groupstats.pl
4#
5# This script will get statistical data on newgroup usage
6# from a database.
7#
8# It is part of the NewsStats package.
9#
10# Copyright (c) 2010-2013 Thomas Hochstein <thh@inter.net>
11#
12# It can be redistributed and/or modified under the same terms under
13# which Perl itself is published.
14
15BEGIN {
16 our $VERSION = "0.01";
17 use File::Basename;
18 # we're in .../bin, so our module is in ../lib
19 push(@INC, dirname($0).'/../lib');
20}
21use strict;
22use warnings;
23
24use NewsStats qw(:DEFAULT :TimePeriods :Output :SQLHelper ReadGroupList);
25
26use DBI;
27use Getopt::Long qw(GetOptions);
28Getopt::Long::config ('bundling');
29
30################################# Main program #################################
31
32### read commandline options
33my ($OptBoundType,$OptCaptions,$OptCheckgroupsFile,$OptComments,
34 $OptFileTemplate,$OptFormat,$OptGroupBy,$OptGroupsDB,$LowBound,$OptMonth,
35 $OptNewsgroups,$OptOrderBy,$OptReportType,$OptSums,$UppBound);
36GetOptions ('b|boundary=s' => \$OptBoundType,
37 'c|captions!' => \$OptCaptions,
38 'checkgroups=s' => \$OptCheckgroupsFile,
39 'comments!' => \$OptComments,
40 'filetemplate=s' => \$OptFileTemplate,
41 'f|format=s' => \$OptFormat,
42 'g|group-by=s' => \$OptGroupBy,
43 'groupsdb=s' => \$OptGroupsDB,
44 'l|lower=i' => \$LowBound,
45 'm|month=s' => \$OptMonth,
46 'n|newsgroups=s' => \$OptNewsgroups,
47 'o|order-by=s' => \$OptOrderBy,
48 'r|report=s' => \$OptReportType,
49 's|sums!' => \$OptSums,
50 'u|upper=i' => \$UppBound,
51 'h|help' => \&ShowPOD,
52 'V|version' => \&ShowVersion) or exit 1;
53# parse parameters
54# $OptComments defaults to TRUE
55$OptComments = 1 if (!defined($OptComments));
56# force --nocomments when --filetemplate is used
57$OptComments = 0 if ($OptFileTemplate);
58# parse $OptBoundType
59if ($OptBoundType) {
60 if ($OptBoundType =~ /level/i) {
61 $OptBoundType = 'level';
62 } elsif ($OptBoundType =~ /av(era)?ge?/i) {
63 $OptBoundType = 'average';
64 } elsif ($OptBoundType =~ /sums?/i) {
65 $OptBoundType = 'sum';
66 } else {
67 $OptBoundType = 'default';
68 }
69}
70# parse $OptReportType
71if ($OptReportType) {
72 if ($OptReportType =~ /av(era)?ge?/i) {
73 $OptReportType = 'average';
74 } elsif ($OptReportType =~ /sums?/i) {
75 $OptReportType = 'sum';
76 } else {
77 $OptReportType = 'default';
78 }
79}
80# read list of newsgroups from --checkgroups
81# into a hash reference
82my $ValidGroups = &ReadGroupList($OptCheckgroupsFile) if $OptCheckgroupsFile;
83
84### read configuration
85my %Conf = %{ReadConfig('')};
86
87### override configuration via commandline options
88my %ConfOverride;
89$ConfOverride{'DBTableGrps'} = $OptGroupsDB if $OptGroupsDB;
90&OverrideConfig(\%Conf,\%ConfOverride);
91
92### init database
93my $DBHandle = InitDB(\%Conf,1);
94
95### get time period and newsgroups, prepare SQL 'WHERE' clause
96# get time period
97# and set caption for output and expression for SQL 'WHERE' clause
98my ($CaptionPeriod,$SQLWherePeriod) = &GetTimePeriod($OptMonth);
99# bail out if --month is invalid
100&Bleat(2,"--month option has an invalid format - ".
101 "please use 'YYYY-MM', 'YYYY-MM:YYYY-MM' or 'ALL'!") if !$CaptionPeriod;
102# get list of newsgroups and set expression for SQL 'WHERE' clause
103# with placeholders as well as a list of newsgroup to bind to them
104my ($SQLWhereNewsgroups,@SQLBindNewsgroups);
105if ($OptNewsgroups) {
106 ($SQLWhereNewsgroups,@SQLBindNewsgroups) = &SQLGroupList($OptNewsgroups);
107 # bail out if --newsgroups is invalid
108 &Bleat(2,"--newsgroups option has an invalid format!")
109 if !$SQLWhereNewsgroups;
110}
111
112### build SQL WHERE clause (and HAVING clause, if needed)
113my ($SQLWhereClause,$SQLHavingClause);
114# $OptBoundType 'level'
115if ($OptBoundType and $OptBoundType ne 'default') {
116 $SQLWhereClause = SQLBuildClause('where',$SQLWherePeriod,
117 $SQLWhereNewsgroups,&SQLHierarchies($OptSums));
118 $SQLHavingClause = SQLBuildClause('having',&SQLSetBounds($OptBoundType,
119 $LowBound,$UppBound));
120# $OptBoundType 'threshold' / 'default' or none
121} else {
122 $SQLWhereClause = SQLBuildClause('where',$SQLWherePeriod,
123 $SQLWhereNewsgroups,&SQLHierarchies($OptSums),
124 &SQLSetBounds('default',$LowBound,$UppBound));
125}
126
127### get sort order and build SQL 'ORDER BY' clause
128# default to 'newsgroup' for $OptBoundType 'level' or 'average'
129$OptGroupBy = 'newsgroup' if (!$OptGroupBy and
130 $OptBoundType and $OptBoundType ne 'default');
131# force to 'month' for $OptReportType 'average' or 'sum'
132$OptGroupBy = 'month' if ($OptReportType and $OptReportType ne 'default');
133# parse $OptGroupBy to $GroupBy, create ORDER BY clause $SQLOrderClause
134my ($GroupBy,$SQLOrderClause) = SQLSortOrder($OptGroupBy, $OptOrderBy);
135# $GroupBy will contain 'month' or 'newsgroup' (parsed result of $OptGroupBy)
136# set it to 'month' or 'key' for OutputData()
137$GroupBy = ($GroupBy eq 'month') ? 'month' : 'key';
138
139### get report type and build SQL 'SELECT' query
140my $SQLSelect;
141my $SQLGroupClause = '';
142my $Precision = 0; # number of digits right of decimal point for output
143if ($OptReportType and $OptReportType ne 'default') {
144 $SQLGroupClause = 'GROUP BY newsgroup';
145 # change $SQLOrderClause: replace everything before 'postings'
146 $SQLOrderClause =~ s/BY.+postings/BY postings/;
147 if ($OptReportType eq 'average') {
148 $SQLSelect = "'All months',newsgroup,AVG(postings)";
149 $Precision = 2;
150 # change $SQLOrderClause: replace 'postings' with 'AVG(postings)'
151 $SQLOrderClause =~ s/postings/AVG(postings)/;
152 } elsif ($OptReportType eq 'sum') {
153 $SQLSelect = "'All months',newsgroup,SUM(postings)";
154 # change $SQLOrderClause: replace 'postings' with 'SUM(postings)'
155 $SQLOrderClause =~ s/postings/SUM(postings)/;
156 }
157 } else {
158 $SQLSelect = 'month,newsgroup,postings';
159};
160
161### get length of longest newsgroup name delivered by query
162### for formatting purposes
163my $Field = ($GroupBy eq 'month') ? 'newsgroup' : 'month';
164my ($MaxLength,$MaxValLength) = &GetMaxLength($DBHandle,$Conf{'DBTableGrps'},
165 $Field,'postings',$SQLWhereClause,
166 $SQLHavingClause,
167 @SQLBindNewsgroups);
168
169### build and execute SQL query
170my ($DBQuery);
171# special query preparation for $OptBoundType 'level', 'average' or 'sums'
172if ($OptBoundType and $OptBoundType ne 'default') {
173 # prepare and execute first query:
174 # get list of newsgroups meeting level conditions
175 $DBQuery = $DBHandle->prepare(sprintf('SELECT newsgroup FROM %s.%s %s '.
176 'GROUP BY newsgroup %s',
177 $Conf{'DBDatabase'},$Conf{'DBTableGrps'},
178 $SQLWhereClause,$SQLHavingClause));
179 $DBQuery->execute(@SQLBindNewsgroups)
180 or &Bleat(2,sprintf("Can't get groups data for %s from %s.%s: %s\n",
181 $CaptionPeriod,$Conf{'DBDatabase'},$Conf{'DBTableGrps'},
182 $DBI::errstr));
183 # add newsgroups to a comma-seperated list ready for IN(...) query
184 my $GroupList;
185 while (my ($Newsgroup) = $DBQuery->fetchrow_array) {
186 $GroupList .= ',' if $GroupList;
187 $GroupList .= "'$Newsgroup'";
188 };
189 # enhance $WhereClause
190 if ($GroupList) {
191 $SQLWhereClause = SQLBuildClause('where',$SQLWhereClause,
192 sprintf('newsgroup IN (%s)',$GroupList));
193 } else {
194 # condition cannot be satisfied;
195 # force query to fail by adding '0=1'
196 $SQLWhereClause = SQLBuildClause('where',$SQLWhereClause,'0=1');
197 }
198}
199
200# prepare query
201$DBQuery = $DBHandle->prepare(sprintf('SELECT %s FROM %s.%s %s %s %s',
202 $SQLSelect,
203 $Conf{'DBDatabase'},$Conf{'DBTableGrps'},
204 $SQLWhereClause,$SQLGroupClause,
205 $SQLOrderClause));
206
207# execute query
208$DBQuery->execute(@SQLBindNewsgroups)
209 or &Bleat(2,sprintf("Can't get groups data for %s from %s.%s: %s\n",
210 $CaptionPeriod,$Conf{'DBDatabase'},$Conf{'DBTableGrps'},
211 $DBI::errstr));
212
213### output results
214# set default to 'pretty'
215$OptFormat = 'pretty' if !$OptFormat;
216# print captions if --caption is set
217if ($OptCaptions && $OptComments) {
218 # print time period with report type
219 my $CaptionReportType= '(number of postings for each month)';
220 if ($OptReportType and $OptReportType ne 'default') {
221 $CaptionReportType= '(average number of postings for each month)'
222 if $OptReportType eq 'average';
223 $CaptionReportType= '(number of all postings for that time period)'
224 if $OptReportType eq 'sum';
225 }
226 printf("# ----- Report for %s %s\n",$CaptionPeriod,$CaptionReportType);
227 # print newsgroup list if --newsgroups is set
228 printf("# ----- Newsgroups: %s\n",join(',',split(/:/,$OptNewsgroups)))
229 if $OptNewsgroups;
230 # print boundaries, if set
231 my $CaptionBoundary= '(counting only month fulfilling this condition)';
232 if ($OptBoundType and $OptBoundType ne 'default') {
233 $CaptionBoundary= '(every single month)' if $OptBoundType eq 'level';
234 $CaptionBoundary= '(on average)' if $OptBoundType eq 'average';
235 $CaptionBoundary= '(all month summed up)' if $OptBoundType eq 'sum';
236 }
237 printf("# ----- Threshold: %s %s x %s %s %s\n",
238 $LowBound ? $LowBound : '',$LowBound ? '=>' : '',
239 $UppBound ? '<=' : '',$UppBound ? $UppBound : '',$CaptionBoundary)
240 if ($LowBound or $UppBound);
241 # print primary and secondary sort order
242 printf("# ----- Grouped by %s (%s), sorted %s%s\n",
243 ($GroupBy eq 'month') ? 'Months' : 'Newsgroups',
244 ($OptGroupBy and $OptGroupBy =~ /-?desc$/i) ? 'descending' : 'ascending',
245 ($OptOrderBy and $OptOrderBy =~ /posting/i) ? 'by number of postings ' : '',
246 ($OptOrderBy and $OptOrderBy =~ /-?desc$/i) ? 'descending' : 'ascending');
247}
248
249# output data
250&OutputData($OptFormat,$OptComments,$GroupBy,$Precision,
251 $OptCheckgroupsFile ? $ValidGroups : '',
252 $OptFileTemplate,$DBQuery,$MaxLength,$MaxValLength);
253
254### close handles
255$DBHandle->disconnect;
256
257__END__
258
259################################ Documentation #################################
260
261=head1 NAME
262
263groupstats - create reports on newsgroup usage
264
265=head1 SYNOPSIS
266
267B<groupstats> [B<-Vhcs> B<--comments>] [B<-m> I<YYYY-MM>[:I<YYYY-MM>] | I<all>] [B<-n> I<newsgroup(s)>] [B<--checkgroups> I<checkgroups file>] [B<-r> I<report type>] [B<-l> I<lower boundary>] [B<-u> I<upper boundary>] [B<-b> I<boundary type>] [B<-g> I<group by>] [B<-o> I<order by>] [B<-f> I<output format>] [B<--filetemplate> I<filename template>] [B<--groupsdb> I<database table>]
268
269=head1 REQUIREMENTS
270
271See L<doc/README>.
272
273=head1 DESCRIPTION
274
275This script create reports on newsgroup usage (number of postings per
276group per month) taken from result tables created by
277B<gatherstats.pl>.
278
279=head2 Features and options
280
281=head3 Time period and newsgroups
282
283The time period to act on defaults to last month; you can assign another
284time period or a single month (or drop all time constraints) via the
285B<--month> option (see below).
286
287B<groupstats> will process all newsgroups by default; you can limit
288processing to only some newsgroups by supplying a list of those groups via
289B<--newsgroups> option (see below). You can include hierarchy levels in
290the output by adding the B<--sums> switch (see below). Optionally
291newsgroups not present in a checkgroups file can be excluded from output,
292sse B<--checkgroups> below.
293
294=head3 Report type
295
296You can choose between different B<--report> types: postings per month,
297average postings per month or all postings summed up; for details, see
298below.
299
300=head3 Upper and lower boundaries
301
302Furthermore you can set an upper and/or lower boundary to exclude some
303results from output via the B<--lower> and B<--upper> options,
304respectively. By default, all newsgroups with more and/or less postings
305per month will be excluded from the result set (i.e. not shown and not
306considered for average and sum reports). You can change the meaning of
307those boundaries with the B<--boundary> option. For details, please see
308below.
309
310=head3 Sorting and formatting the output
311
312By default, all results are grouped by month; you can group results by
313newsgroup instead via the B<--groupy-by> option. Within those groups, the
314list of newsgroups (or months) is sorted alphabetically (or
315chronologically, respectively) ascending. You can change that order (and
316sort by number of postings) with the B<--order-by> option. For details and
317exceptions, please see below.
318
319The results will be formatted as a kind of table; you can change the
320output format to a simple list or just a list of newsgroups and number of
321postings with the B<--format> option. Captions will be added by means of
322the B<--caption> option; all comments (and captions) can be supressed by
323using B<--nocomments>.
324
325Last but not least you can redirect all output to a number of files, e.g.
326one for each month, by submitting the B<--filetemplate> option, see below.
327Captions and comments are automatically disabled in this case.
328
329=head2 Configuration
330
331B<groupstats> will read its configuration from F<newsstats.conf>
332which should be present in the same directory via Config::Auto.
333
334See doc/INSTALL for an overview of possible configuration options.
335
336You can override some configuration options via the B<--groupsdb> option.
337
338=head1 OPTIONS
339
340=over 3
341
342=item B<-V>, B<--version>
343
344Print out version and copyright information and exit.
345
346=item B<-h>, B<--help>
347
348Print this man page and exit.
349
350=item B<-m>, B<--month> I<YYYY-MM[:YYYY-MM]|all>
351
352Set processing period to a single month in YYYY-MM format or to a time
353period between two month in YYYY-MM:YYYY-MM format (two month, separated
354by a colon). By using the keyword I<all> instead, you can set no
355processing period to process the whole database.
356
357=item B<-n>, B<--newsgroups> I<newsgroup(s)>
358
359Limit processing to a certain set of newsgroups. I<newsgroup(s)> can
360be a single newsgroup name (de.alt.test), a newsgroup hierarchy
361(de.alt.*) or a list of either of these, separated by colons, for
362example
363
364 de.test:de.alt.test:de.newusers.*
365
366=item B<-s>, B<--sums|--nosums> (sum per hierarchy level)
367
368Include "virtual" groups for every hierarchy level in output, for
369example:
370
371 de.alt.ALL 10
372 de.alt.test 5
373 de.alt.admin 7
374
375See the B<gatherstats> man page for details.
376
377=item B<--checkgroups> I<filename>
378
379Restrict output to those newgroups present in a file in checkgroups format
380(one newgroup name per line; everything after the first whitespace on each
381line is ignored). All other newsgroups will be removed from output.
382
383Contrary to B<gatherstats>, I<filename> is not a template, but refers to
384a single file in checkgroups format.
385
386=item B<-r>, B<--report> I<default|average|sums>
387
388Choose the report type: I<default>, I<average> or I<sums>
389
390By default, B<groupstats> will report the number of postings for each
391newsgroup in each month. But it can also report the average number of
392postings per group for all months or the total sum of postings per group
393for all months.
394
395For report types I<average> and I<sums>, the B<group-by> option has no
396meaning and will be silently ignored (see below).
397
398=item B<-l>, B<--lower> I<lower boundary>
399
400Set the lower boundary. See B<--boundary> below.
401
402=item B<-l>, B<--upper> I<upper boundary>
403
404Set the upper boundary. See B<--boundary> below.
405
406=item B<-b>, B<--boundary> I<boundary type>
407
408Set the boundary type to one of I<default>, I<level>, I<average> or
409I<sums>.
410
411By default, all newsgroups with more postings per month than the upper
412boundary and/or less postings per month than the lower boundary will be
413excluded from further processing. For the default report that means each
414month only newsgroups with a number of postings between the boundaries
415will be displayed. For the other report types, newsgroups with a number of
416postings exceeding the boundaries in all (!) months will not be
417considered.
418
419For example, lets take a list of newsgroups like this:
420
421 ----- 2012-01:
422 de.comp.datenbanken.misc 6
423 de.comp.datenbanken.ms-access 84
424 de.comp.datenbanken.mysql 88
425 ----- 2012-02:
426 de.comp.datenbanken.misc 8
427 de.comp.datenbanken.ms-access 126
428 de.comp.datenbanken.mysql 21
429 ----- 2012-03:
430 de.comp.datenbanken.misc 24
431 de.comp.datenbanken.ms-access 83
432 de.comp.datenbanken.mysql 36
433
434With C<groupstats --month 2012-01:2012-03 --lower 25 --report sums>,
435you'll get the following result:
436
437 ----- All months:
438 de.comp.datenbanken.ms-access 293
439 de.comp.datenbanken.mysql 124
440
441de.comp.datenbanken.misc has not been considered even though it has 38
442postings in total, because it has less than 25 postings in every single
443month. If you want to list all newsgroups with more than 25 postings
444I<in total>, you'll have to set the boundary type to I<sum>, see below.
445
446A boundary type of I<level> will show only those newsgroups - at all -
447that satisfy the boundaries in each and every single month. With the above
448list of newsgroups and
449C<groupstats --month 2012-01:2012-03 --lower 25 --boundary level --report sums>,
450you'll get this result:
451
452 ----- All months:
453 de.comp.datenbanken.ms-access 293
454
455de.comp.datenbanken.mysql has not been considered because it had less than
45625 postings in 2012-02 (only).
457
458You can use that to get a list of newsgroups that have more (or less) then
459x postings in every month during the whole reporting period.
460
461A boundary type of I<average> will show only those newsgroups - at all -that
462satisfy the boundaries on average. With the above list of newsgroups and
463C<groupstats --month 2012-01:2012-03 --lower 25 --boundary avg --report sums>,
464you'll get this result:
465
466 ----- All months:
467 de.comp.datenbanken.ms-access 293
468 de.comp.datenbanken.mysql 145
469
470The average number of postings in the three groups is:
471
472 de.comp.datenbanken.misc 12.67
473 de.comp.datenbanken.ms-access 97.67
474 de.comp.datenbanken.mysql 48.33
475
476Last but not least, a boundary type of I<sums> will show only those
477newsgroups - at all - that satisfy the boundaries with the total sum of
478all postings during the reporting period. With the above list of
479newsgroups and
480C<groupstats --month 2012-01:2012-03 --lower 25 --boundary sum --report sums>,
481you'll finally get this result:
482
483 ----- All months:
484 de.comp.datenbanken.misc 38
485 de.comp.datenbanken.ms-access 293
486 de.comp.datenbanken.mysql 145
487
488
489=item B<-g>, B<--group-by> I<month[-desc]|newsgroups[-desc]>
490
491By default, all results are grouped by month, sorted chronologically in
492ascending order, like this:
493
494 ----- 2012-01:
495 de.comp.datenbanken.ms-access 84
496 de.comp.datenbanken.mysql 88
497 ----- 2012-02:
498 de.comp.datenbanken.ms-access 126
499 de.comp.datenbanken.mysql 21
500
501The results can be grouped by newsgroups instead via
502B<--group-by> I<newsgroup>:
503
504 ----- de.comp.datenbanken.ms-access:
505 2012-01 84
506 2012-02 126
507 ----- de.comp.datenbanken.mysql:
508 2012-01 88
509 2012-02 21
510
511By appending I<-desc> to the group-by option parameter, you can reverse
512the sort order - e.g. B<--group-by> I<month-desc> will give:
513
514 ----- 2012-02:
515 de.comp.datenbanken.ms-access 126
516 de.comp.datenbanken.mysql 21
517 ----- 2012-01:
518 de.comp.datenbanken.ms-access 84
519 de.comp.datenbanken.mysql 88
520
521Average and sums reports (see above) will always be grouped by months;
522this option will therefore be ignored.
523
524=item B<-o>, B<--order-by> I<default[-desc]|postings[-desc]>
525
526Within each group (a single month or single newsgroup, see above), the
527report will be sorted by newsgroup names in ascending alphabetical order
528by default. You can change the sort order to descending or sort by number
529of postings instead.
530
531=item B<-f>, B<--format> I<pretty|list|dump>
532
533Select the output format, I<pretty> being the default:
534
535 ----- 2012-01:
536 de.comp.datenbanken.ms-access 84
537 de.comp.datenbanken.mysql 88
538 ----- 2012-02:
539 de.comp.datenbanken.ms-access 126
540 de.comp.datenbanken.mysql 21
541
542I<list> format looks like this:
543
544 2012-01 de.comp.datenbanken.ms-access 84
545 2012-01 de.comp.datenbanken.mysql 88
546 2012-02 de.comp.datenbanken.ms-access 126
547 2012-02 de.comp.datenbanken.mysql 21
548
549And I<dump> format looks like this:
550
551 # 2012-01:
552 de.comp.datenbanken.ms-access 84
553 de.comp.datenbanken.mysql 88
554 # 2012-02:
555 de.comp.datenbanken.ms-access 126
556 de.comp.datenbanken.mysql 21
557
558You can remove the comments by using B<--nocomments>, see below.
559
560=item B<-c>, B<--captions|--nocaptions>
561
562Add captions to output, like this:
563
564 ----- Report for 2012-01 to 2012-02 (number of postings for each month)
565 ----- Newsgroups: de.comp.datenbanken.*
566 ----- Threshold: 10 => x <= 20 (on average)
567 ----- Grouped by Newsgroups (ascending), sorted by number of postings descending
568
569False by default.
570
571=item B<--comments|--nocomments>
572
573Add comments (group headers) to I<dump> and I<pretty> output. True by default.
574
575Use I<--nocomments> to suppress anything except newsgroup names/months and
576numbers of postings. This is enforced when using B<--filetemplate>, see below.
577
578=item B<--filetemplate> I<filename template>
579
580Save output to file(s) instead of dumping it to STDOUT. B<groupstats> will
581create one file for each month (or each newsgroup, accordant to the
582setting of B<--group-by>, see above), with filenames composed by adding
583year and month (or newsgroup names) to the I<filename template>, for
584example with B<--filetemplate> I<stats>:
585
586 stats-2012-01
587 stats-2012-02
588 ... and so on
589
590B<--nocomments> is enforced, see above.
591
592=item B<--groupsdb> I<database table>
593
594Override I<DBTableGrps> from F<newsstats.conf>.
595
596=back
597
598=head1 INSTALLATION
599
600See L<doc/INSTALL>.
601
602=head1 EXAMPLES
603
604Show number of postings per group for lasth month in I<pretty> format:
605
606 groupstats
607
608Show that report for January of 2010 and de.alt.* plus de.test,
609including display of hierarchy levels:
610
611 groupstats --month 2010-01 --newsgroups de.alt.*:de.test --sums
612
613Only show newsgroups with 30 postings or less last month, ordered
614by number of postings, descending, in I<pretty> format:
615
616 groupstats --upper 30 --order-by postings-desc
617
618Show the total of all postings for the year of 2010 for all groups that
619had 30 postings or less in every single month in that year, ordered by
620number of postings in descending order:
621
622 groupstats -m 2010-01:2010-12 -u 30 -b level -r sums -o postings-desc
623
624The same for the average number of postings in the year of 2010:
625
626 groupstats -m 2010-01:2010-12 -u 30 -b level -r avg -o postings-desc
627
628List number of postings per group for eacht month of 2010 and redirect
629output to one file for each month, namend stats-2010-01 and so on, in
630machine-readable form (without formatting):
631
632 groupstats -m 2010-01:2010-12 -f dump --filetemplate stats
633
634
635=head1 FILES
636
637=over 4
638
639=item F<bin/groupstats.pl>
640
641The script itself.
642
643=item F<lib/NewsStats.pm>
644
645Library functions for the NewsStats package.
646
647=item F<etc/newsstats.conf>
648
649Runtime configuration file.
650
651=back
652
653=head1 BUGS
654
655Please report any bugs or feature requests to the author or use the
656bug tracker at L<http://bugs.th-h.de/>!
657
658=head1 SEE ALSO
659
660=over 2
661
662=item -
663
664L<doc/README>
665
666=item -
667
668l>doc/INSTALL>
669
670=item -
671
672gatherstats -h
673
674=back
675
676This script is part of the B<NewsStats> package.
677
678=head1 AUTHOR
679
680Thomas Hochstein <thh@inter.net>
681
682=head1 COPYRIGHT AND LICENSE
683
684Copyright (c) 2010-2012 Thomas Hochstein <thh@inter.net>
685
686This program is free software; you may redistribute it and/or modify it
687under the same terms as Perl itself.
688
689=cut
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