Check if last 10 rows duplicated - php

Question

I'm trying to code a php script, which can find if the last 10 rows from mySQL database are the same. And if the values are same, then the script could sent an email.
I can fetch the last 10 rows.
$sql = ("SELECT ID, DayTime,Temperature FROM AllinOne ORDER BY ID DESC LIMIT 10");
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result) > 0) {
// output data of each row
while($row = mysqli_fetch_assoc($result)) {
echo "id: " . $row["ID"]. " - DayTime: " . $row["DayTime"]. " - Temperature " . $row["Temperature"]. "<br>";
}
} else {
echo "0 results";
}
Last 10 results:
Now, I'm trying to check if last 10 rows in "Temperature" column are the same (as we can see).
I use:
$sql2 = "SELECT Temperature, COUNT(*) as duplicates FROM AllinOne GROUP BY Temperature ORDER BY ID DESC LIMIT 10";
$result2 = $conn->query($sql2);
if ($result2->num_rows > 0)
{
// output data of each row
while($row2 = $result2->fetch_assoc())
{
echo $row2["duplicates"]. "<br>";
}
}
but I can't take back the same results (i can't understand the final result).
$row2 results
Could you help me???

Answer 1

Execute the following query and grab the result:
SELECT
COUNT(*) AS count_rows,
MIN(Temperature) AS min_temperature,
MAX(Temperature) AS max_temperature
FROM (
SELECT *
FROM t
ORDER BY DayTime DESC
LIMIT 10
) AS x
Then send an email if count_rows = 10 and min_temperature = max_temperature.

Answer 2

You just need to fix your second query like:
$sql2 = "SELECT Temperature, COUNT(*) as duplicates
FROM (
SELECT ID, DayTime, Temperature FROM AllinOne ORDER BY ID DESC LIMIT 10
) LastData
GROUP BY Temperature";
Here you can test PHP code with queries