report1

• Assumes the table argument is a properly quoted table name.
• Use a placeholder to avoid problems from (intentially or unintentially) badly formed statusid arguments.
• Executes one query per statusid argument.
• Does the counting server-side.
• Can do result ordering server-side.

report2

• Assumes the table argument is a properly quoted table name.
• Assumes the statusid arguments are valid numbers.
• Only executes one query.
• Does the counting client-side.
• Result ordering must be done client-side.

The different assumptions impose different validation requirements on the caller.
The number of queries affects performance.

Update: report3 uses the best features of report1 and report2.

sub report3 {
    my $table = shift @_;
    my @statusids = @_;

    my $sql = "
        SELECT statusid, COUNT(statusid)
          FROM $table
         WHERE statusid IN (". join(',', ('?')x@statusids) . ")
         GROUP BY statusid
    ";

    my $sth = $DBH->prepare($sql);
    $sth->execute(@statusids);

    while (my ($statusid, $count) = $sth->fetchrow_array) {
        print "$statusid = $count\n";
    }
}
[download]

• Assumes the table argument is a properly quoted table name.
• Use a placeholder to avoid problems from (intentially or unintentially) badly formed statusid arguments.
• Only executes one query.
• Does the counting server-side.
• Can do result ordering server-side.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.