How do you call data from a non-modx table

<?php
$output = '';//create variable for holding the output
$sql = $modx->db->query( 'SELECT * FROM `tblabout` LIMIT 0, 1000');//define the DB query, in this case the table is named 'tblabout', add WHERE AND etc. as needed
$resultArray = $modx->db->makeArray( $sql );//put it into an array
foreach($resultArray as $item) //go through each record in the array
{//start looping through the data array
$params['name']=$item['names'];//set the placeholders, the $params sets the name of the placeholder, the $item is the field name from the DB table
$params['about']=$item['content'];
$output.=$modx->parseChunk('about', $params, '[+', '+]');//define the chunk name and process the content
}//finish looping through the data array
return $output;//now return the output from the processed chunk
?>

<h3>[+names+]</h3>
<p>[+content+]</p>

[+about+]

$modx->db->getRow();

$modx->db->getRow($sql);

[!MySnippetName!]