PHP SQLite Aggregate function MIN to get lowest data of a column

We will create the database and connection object.

$my_conn = new PDO('sqlite:my_student.sqlite3');

We will use $my_conn to execute our query.

By using min query we will display lowest mark.

Lowest mark across all classes from student table

<?php 
$my_conn = new PDO('sqlite:my_student.sqlite3');
  // Set errormode to exceptions
$my_conn->setAttribute(PDO::ATTR_ERRMODE, 
                            PDO::ERRMODE_EXCEPTION);
$sql="SELECT min(mark) as m_mark FROM student ";

$result=$my_conn->query($sql);
$row = $result->fetch(PDO::FETCH_OBJ);
echo " Lowest Mark : ".$row->m_mark;
?>

Output is here

Lowest Mark : 18

We can get the details of the student who got minimum mark. Here we will use sub query to get the matching record.

$sql="SELECT * FROM `student` WHERE mark=(select min(mark) from student)";
$result=$my_conn->query($sql);
$row = $result->fetch(PDO::FETCH_OBJ);
echo " Lowest Mark : ".$row->mark;
echo " <br>ID  : ".$row->id;
echo " <br>Name  : ".$row->name;
echo " <br>Class  : ".$row->class;
echo " <br>Sex  : ".$row->sex;

Output is here

Lowest Mark : 18
ID : 19
Name : Tinny
Class : Nine
Sex : male

We can get the lowest mark of all classes by using group by query.

$my_conn = new PDO('sqlite:my_student.sqlite3');
  // Set errormode to exceptions
$my_conn->setAttribute(PDO::ATTR_ERRMODE, 
                            PDO::ERRMODE_EXCEPTION);
$sql="SELECT class,min(mark) as m_mark FROM student group by class";

$step = $my_conn->prepare($sql);
	
$step->execute();
$step = $step->fetchAll();
echo "<table>";
foreach ($step as $row) {
echo "<tr ><td>$row[class]</td><td>$row[m_mark]</td></tr>";
}
echo "</table>";	
	
 $my_conn = null;

Output

Eight	79
Five	75
Four	55
Nine	18
Seven	55
Six	54
Three	55

Download sample script for SQLite with instructions on how to use.

MIN()

PHP SQLite PDO Functions

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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PHP SQLite MIN query

Subhendu Mohapatra