well i had tried the DBI::CSV before i posted this question and i did the same thing you say here
BUT when i try to use the
DISTINCT in my SQL it does not seem to return the desired result?
Here is what i had:
#!/usr/local/bin/perl
use DBI;
my $dbh = DBI->connect(
"DBI:CSV:f_dir=/export/home/temp;csv_eol=\n;csv_sep_char=!;
+",
{RaiseError=>1},
);
$dbh->{'csv_tables'}->{'datainfo'} = {
'file' => 'datainfo.data',
# 'sep_char' => "!",
'quote_char' => undef,
'escape_char' => undef,
'col_names' => ["id", "class", "name", "instructor"]
};
my ($query) = "select distinct id, class from datainfo ";
my ($sth) = $dbh->prepare($query);
$sth->execute();
while (my $row = $sth->fetchrow_hashref) {
print ("ID =", $row->{'id'}, "\n\t CLASS = ", $row->{'class'}
+, "\n");
}
print "\n";
you know i just say a mistake in my code, and when i tried to run it with just one column in the select it ran correctly! I wonder if DBI::CSV does allow mutilple columns to be listed with a DISTINCT
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! —
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: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.