First, I don't think MySQL lets you do a "SELECT * FROM A INTO B", though you can do: 
INSERT INTO A (col1,col2,col3) SELECT fld1,fld2,fld3 FROM B;

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Also, you only need one database connection to run both those queries since they both act on the same database. And, I would use $row[0] a bit differently, 
my @pats = ();
my $dbh = DBI->connect("DBI:mysql:database=proyecto;host=localhost",
                       "root", "xyz123",
                       {'RaiseError' => 1}
          );
my $sth = $dbh->prepare("SELECT DISTINCT PAT FROM patentes");
$sth->execute();
while (my @row = $sth->fetchrow_array) {
     push @pats, $row[0];
}

foreach (@pats) {
     # TODO: CREATE TABLE NAMED $_ HERE ?
     $dbh->do("INSERT INTO $_(col1,col2,col3) SELECT fld1,fld2,fld3 FR
+OM patente WHERE pat = $_");
}

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However, from your post, it sounds like you'll also need to run a CREATE statement for each table in @pats, unless they already exist.

---
echo S 1 [ Y V U | perl -ane 'print reverse map { $_ = chr(ord($_)-1) } @F;'
Warning: Any code posted by tuxz0r is untested, unless otherwise stated, and is used at your own risk.

In reply to Re: Trouble with syntax with SELECT by tuxz0r
in thread Trouble with syntax with SELECT by ArmandoG

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