Multiple MYSQL Queries against one PHP variable - mysql

Question

I've broken down individual SQL queries for the information I want from my SQL table but I'm confused on how I can combine all statements agianst one variable. This variable is being used in PHP to display my data.
Here is the SQL queries I'm wanting to run.
SELECT * FROM weather ORDER BY stamp DESC LIMIT 1
SELECT SUM(rainfall) FROM weather WHERE stamp >= CURDATE()) AS total_rainfall
SELECT MAX(maxwind) FROM weather WHERE stamp >= CURDATE()) AS max_windspeed
SELECT MAX(temperature) FROM weather WHERE stamp >= CURDATE()) AS max_temperature
SELECT MIN(temperature) FROM weather WHERE stamp >= CURDATE()) AS min_temperature
Here is my current query which gives me everything I want except the max windspeed, max temperature, and minimum temperature for the last 24 hours.
SELECT *, (SELECT SUM(rainfall) FROM weather WHERE stamp >= CURDATE()) AS total_rainfall FROM weather ORDER BY stamp DESC LIMIT 1
Basically, I'm just wanting to add the maximum temperature, minimum temperature and maximum windspeed that occured within the current date.
MySQL data table example
Here is the way I'm trying to display the data using PHP.
<?php
$url1=$_SERVER['REQUEST_URI'];
header("Refresh: 60; URL=$url1");
$connectinfo = mysql_connect("***", "***", "***")
or die(mysql_error());
mysql_select_db("raspberrydb001", $connectinfo);
$sql = "SELECT *, (SELECT SUM(rainfall) FROM weatherdata WHERE stamp >= CURDATE()) AS total_rainfall FROM weatherdata ORDER BY stamp DESC LIMIT 1; ";
$result = mysql_query($sql, $connectinfo);
while($row = mysql_fetch_array($result)) {
$windspeed = $row['windspeed'];
$maxwind = $row['maxwind'];
$temperature = $row['temperature'];
$humidity = $row['humidity'];
$rainfall = $row['rainfall'];
$stamp = $row['stamp'];
$d=mktime();
$total_rainfall = $row['total_rainfall'];
echo "<div style='text-align:center'><h5>Temperature: " . $temperature . "(F)" . "<br>" . "Rainfall: " . $total_rainfall . "(in)" . "<br>" . "Wind: " . $windspeed . "(MPH)" . "<br>" . "Humidity: " . $humidity . "(%)" . "<br>" . "</h5></div>";
echo "<div style='text-align:right'><h6>Updated at: " . $stamp . "</h6></div>";
echo "<br>";
}
?>
Thanks

Answer 1

I would propose to split it up into two queries.
First, to collect all your data:
SELECT * FROM weather ORDER BY stamp DESC LIMIT 1
Second, to collect the min/max data:
SELECT
SUM(rainfall) AS total_rainfall,
MAX(maxwind) AS max_windspeed,
MAX(temperature) AS max_temperature,
MIN(temperature) AS min_temperature
FROM
weather
WHERE stamp >= CURDATE())
LIMIT 1