A simple way of doing this is using 'LIMIT/OFFSET' type of SQL statements. I don't think they are in the official SQL specs, but most SQL servers have some kind of way to just return a limited subset of what you want. MySQL for instance uses this syntax:
SELECT * FROM BLAH ORDER BY ID LIMIT 40 OFFSET 100
to limit your query to items 100-139 in the BLAH table. This makes it easy to write a pager for a table, see for instance Class::DBI::Plugin::Pager, which is a pager for the Class::DBI framework.
This approach doesn't take insertion of rows into account, which may or may not be a problem, depending on how and how often your table changes.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|