For the syntax error, see my update reply above.

I'd not say that prepare stores an address. The following is taken from the DBI module docs

.

The DBI allows an application to ``prepare'' statements for later execution. A prepared statement is identified by a statement handle held in a Perl variable. We'll call the Perl variable $sth in our examples.

The typical method call sequence for a SELECT statement is: 

  prepare,
    execute, fetch, fetch, ...
    execute, fetch, fetch, ...
    execute, fetch, fetch, ...
for example: 
  $sth = $dbh->prepare("SELECT foo, bar FROM table WHERE baz=?");
  $sth->execute( $baz );
  while ( @row = $sth->fetchrow_array ) {
    print "@row\n";
  }

[download]
The typical method call sequence for a non-SELECT statement is: 
  prepare,
    execute,
    execute,
    execute.
for example: 
  $sth = $dbh->prepare("INSERT INTO table(foo,bar,baz) VALUES (?,?,?)"
+);
  while(<CSV>) {
    chop;
    my ($foo,$bar,$baz) = split /,/;
        $sth->execute( $foo, $bar, $baz );
  }

[download]

You can view prepare as a kind of compilation step. (The INSERT query puts something into the table.

Hope this helps, -gjb-

In reply to Re: Re: Re: Re: Learning DBI by gjb
in thread Learning DBI by Bishma

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