Hi,

You may want to read the DBI documentation about prepared statements. A prepared statement is one where instead of actually putting values in the sql, placeholders (?) are used instead. Then the statement can be resused a bunch of times with different data sets. Prepared statements have a number of advantages with regards to security, performance, and reusability all of which are dicussed in the DBI documentation.

Here is an example:

$sql = "select colnm from tblnm where colmn in (?,?,?);
$st = $dbh->prepare($sql);

# Select where colmn in (1, 2, 3)
$st->execute(1, 2, 3);

....

# Select where colmn in (4, 5, 6)
$st->execute(4, 5, 6);

[download]

And so on. In general, the SQL will not contain the values. The values (@array) are passed in during each execution.

Hope this helps.

Ted Young

($$<<$$=>$$<=>$$<=$$>>$$) always returns 1. :-)

In reply to Re: Explanation of Code Problem by TedYoung
in thread Explanation of Code Problem by Anonymous Monk

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