# am i going about this the right way? i want to
# select all rows from table sp where snum does not
# exist in table supplier. i want to then delete
# those rows in table sp

#i'm not sure if i have to make $sth inside of the while
#loop
#something like $sth2

$sql = "SELECT * FROM sp WHERE NOT EXISTS (SELECT * FROM SP,SUPPLIER W
+HERE SUPPLIER.snum = SP.snum)";
$sth = $dbh->prepare($sql);
$sth->execute
              or die "Error: $DBI::errstr\n";

$sth->bind_col(1,\$spnum);
$sth->bind_col(2,\$snum);
$sth->bind_col(3,\$pnum);
$sth->bind_col(4,\$qty);

while($sth->fetch){

     $sql = "INSERT INTO sp_err SELECT * FROM sp WHERE spnum = $spnum 
+&& snum = $snum";
     $sth = $dbh->prepare($sql);
     $sth->execute
             or die "Error: $DBI::errstr\n";
     print "deleted row";

        
 }

[download]

Edit by castaway - added code tags

In reply to nested dbi queries question by philosophia

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • 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:
    & &amp;
    < &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.