Trying to group mysql events with matching dates - php

Question

I am trying to make a simple event form, which displays the date of the event and any events with the same date underneath.e.g. matching date events are listed underneath the same date. Currently it is displaying each insert individually rather than grouping by date.
$readquery = "SELECT * FROM events WHERE id=$userid GROUP BY event_date";
$readresult = $link->query($readquery);
if (!$readresult) {
echo $link->error;
}
Above is the data being called from the SQL table.
<?php
while ($row = $readresult->fetch_assoc()) {
$userid = $row["id"];
$event_date = $row["event_date"];
$event_item = $row["event_item"];
echo "
<br>
<div class='card border border-dark'>
<b> $event_date</b>
<div class='card-body' style='background-color:#6497ED;'>
<div class='card border-dark mb-3 mx-auto' style='max-width: 18rem;'>
<div class='card-body text-dark'>
<h5 class='card-title text-center'>$event_item</h5>
</div>
</div>
</div>
</div>";
}
above is trying to display this in a card. Any help would be great!

Answer 1

You say "Currently it is displaying each insert individually rather than grouping by date." and that is because you do not use any aggregator function like (COUNT, MAX, MIN, SUM, AVG) with this work you say to your query to group your result and I think use the aggregator function in SQL will help you to solve your problem.