I have a plethora of duplicate comments in my Wordpress database, specifically table wp_comments. Of course, those comments have a different IDs. I'd now like to de-dupe those comments based on the field comment_date which would identify all comments posted on the same date and time. I don't care which one of the duplicates remain.
What SQL query do I have to use to achieve this?
Thanks!
EDIT: I don't want to delete a specific comment date across the table, instead I want the database to scan for duplicate dates and remain with only one entry.
You could do a select all query and then loop through those. While in the loop do a query that delete anything that is the same and doesn't have the ID of current index. Backup first.
Update:
I prefer to keep this kind of code in a separate file in the root directory.
SO make a new file in root and call it whatever you want and then add this code. Run the file AFTER YOU BACKUP your comment and comment meta tables.
You could do a select all query and then loop through those. While in the loop do a query that delete anything that is the same and doesn't have the ID of current index. Backup first.
Update:
I prefer to keep this kind of code in a separate file in the root directory.
SO make a new file in root and call it whatever you want and then add this code. Run the file AFTER YOU BACKUP your comment and comment meta tables.
<?php
require('./wp-load.php');
global $wpdb; // loads the DB object
$comments = $wpdb->get_results("SELECT * FROM ".$wpdb->prefix."comments");
foreach((array)$comments as $key => $comment)
{
$id_to_check = $comment->comment_ID; // keep this comment ID
$get_dupes = $wpdb->get_results("SELECT * FROM ".$wpdb->prefix."comments WHERE comment_content = '".$comment->comment_content."' AND comment_ID != $id_to_check OR comment_date = '".$comment->comment_date."' AND comment_ID != '".$id_to_check."' ");
foreach((array)$get_dupes as $dkey => $dupe)
{
$wpdb->query("DELETE FROM ".$wpdb->prefix."commentmeta WHERE comment_id = '".$dupe->comment_ID."'"); // delete duplicate comment meta
}
$wpdb->query("DELETE FROM ".$wpdb->prefix."comments WHERE comment_ID = '".$dupe->comment_ID."'"); // delete duplicate comment
}
echo 'all done!'
?>