Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

MySQL - get next record id from results

Posted on 2010-11-22
3
Medium Priority
?
679 Views
Last Modified: 2012-05-10
Hi,
I have the following query which returns a result set and loops through to display the different records. Is there a way to get the id of the record coming next, perhaps using mysql_data_seek?


mysql_select_db($database_conn_data, $conn_data);
$query_view_items = "SELECT * FROM items ORDER BY sortid";
$view_items = mysql_query($query_view_items, $conn_data) or die(mysql_error());
$row_view_items = mysql_fetch_assoc($view_items);



do {


//get current record id
$id = $row_view_items['id'];

//code here to push pointer forward by one

$next_id =  $row_view_items['id'];

//code here to move pointer back by one
......
...

} while ($row_view_items = mysql_fetch_assoc($view_items));

Thanks in Advance for your feedback.

Cheers,

Andrew
0
Comment
Question by:sabecs
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 17

Expert Comment

by:sweetfa2
ID: 34193888
$numrows = mysql_num_rows($result);
for ($i = 0; $i < $numrows; $i++) {
    if (!($row = mysql_fetch_assoc($result))) {
        continue;
    }
    if (!mysql_data_seek($result, $i + 1)) {
        echo "Cannot seek to row $i: " . mysql_error() . "\n";
        continue;
    }

    if (!($nextrow = mysql_fetch_assoc($result))) {
        continue;
    }

    echo $row['last_name'] . ' ' . $row['first_name'] . "<br />\n";
}

Open in new window

0
 
LVL 17

Accepted Solution

by:
sweetfa2 earned 2000 total points
ID: 34193961
Will try again - forgot a step.

numrows = mysql_num_rows($result);
for ($i = 0; $i < $numrows; $i++) {
    if (!mysql_data_seek($result, $i)) {
        echo "Cannot seek to row $i: " . mysql_error() . "\n";
        continue;
    }

    if (!($row = mysql_fetch_assoc($result))) {
        continue;
    }
    if (!mysql_data_seek($result, $i + 1)) {
        echo "Cannot seek to row $i: " . mysql_error() . "\n";
        continue;
    }

    if (!($nextrow = mysql_fetch_assoc($result))) {
        continue;
    }

}

Open in new window

0
 

Author Closing Comment

by:sabecs
ID: 34201258
Thanks for your help.
0

Featured Post

Will your db performance match your db growth?

In Percona’s white paper “Performance at Scale: Keeping Your Database on Its Toes,” we take a high-level approach to what you need to think about when planning for database scalability.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article shows the steps required to install WordPress on Azure. Web Apps, Mobile Apps, API Apps, or Functions, in Azure all these run in an App Service plan. WordPress is no exception and requires an App Service Plan and Database to install
By, Vadim Tkachenko. In this article we’ll look at ClickHouse on its one year anniversary.
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
In this video, Percona Solution Engineer Rick Golba discuss how (and why) you implement high availability in a database environment. To discuss how Percona Consulting can help with your design and architecture needs for your database and infrastr…
Suggested Courses

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question