MySql While loop taking too long to query - php

Question

just wondered if there was a a faster way of running this query? I have over 250K rows in my 'results' table. The code searches the table for all of the different types of race a trainer has run. It the looks at how many races that trainer has ran in the type of race. Then it looks at hoe many races he/she has won. Hope this is enough information. Thanks for looking.
echo "<div style='text-align:center;'>";
echo "<table id='main_table'>";
echo "<tr ><td align = center colspan = 4>".$trainer."</td></tr>";
$result = mysqli_query($db,"SELECT
DISTINCT RaceType AS racetype
FROM results
WHERE trainer = '$trainer' ORDER BY RaceType ASC"); //placing_numerical,
while($row = mysqli_fetch_array( $result ))
{
echo "<tr>";
echo "<td>";
echo $row['racetype'];
echo "</td>";
echo "<td>";
$result_horse = mysqli_query($db,"
SELECT
COUNT(id) AS result_run
FROM results
WHERE trainer = '$trainer' AND RaceType = '".$row['racetype']."'
");
$row_horse = mysqli_fetch_array( $result_horse );
echo $row_horse['result_run'];
$a = $row_horse['result_run'];
echo "</td>";
echo "<td>";
$result_horse1 = mysqli_query($db,"
SELECT
COUNT(id) AS result_win
FROM results
WHERE trainer = '$trainer' AND RaceType = '".$row['racetype']."' AND placing_numerical = '1'
");
$row_horse1 = mysqli_fetch_array( $result_horse1 );
echo $row_horse1['result_win'];
$b = $row_horse1['result_win'];
echo "</td>";
echo "<td>";
$percent = ($b / $a ) * 100;
$percent = sprintf('%0.0f', $percent);
echo $percent."%";
echo "</td>";
echo "</tr>";
}
echo "</table>";

Answer 1

Here are two suggestions you can check :-
For row_horse and row_horse1 , use "mysqli_fetch_assoc" instead of "mysqli_fetch_array" .
Try to write a single query taking all the three queries and it will save you more time what you are expecting .