Echo total amount of column values from a table php

Question

I want to echo the total amount of a specific column value from the table

For example;

I want to echo, males in the column gender = 3
Similarly below, Helsinki in the column city = 2

Result

Males: 3  
Helsinki:2

This will fetch the total amount of all the table rows:

<?php
$conn = new mysqli("localhost", "root", "", "db_name");
 if ($conn->connect_errno) {
    echo "Error: " . $conn->connect_error;}

$sql = "SELECT * FROM tableName";

if ($stmt = $conn->prepare($sql)) {
    $stmt->execute();
    $stmt->store_result();
    printf("Total: %d\n", $stmt->num_rows);}
?>

Answer 1

You need to do 2 requests or more. 1 request by col.