-- Использование WHERE для фильтрации строк
SELECT product_id, amount
FROM sales
WHERE amount > 100;

-- Использование HAVING для фильтрации агрегированных данных
SELECT product_id, COUNT(*) as sale_count
FROM sales
GROUP BY product_id
HAVING COUNT(*) > 10;

const num = 10 

console.log( Number.isInteger(num) )
// true

const num = 10.3

if (num % 1 === 0) {
    console.log ('Число целое')
} else {
    console.log ('Число не целое')
}

// Число не целое

using System;
using System.Net.Http;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        HttpClient client = new HttpClient();
        Task<string>[] tasks = new Task<string>[]
        {
            client.GetStringAsync("https://example.com/1"),
            client.GetStringAsync("https://example.com/2"),
            client.GetStringAsync("https://example.com/3")
        };

        await Task.WhenEach(tasks, async task =>
        {
            string result = await task;
            Console.WriteLine(result);
        });
    }
}

//This is a single line comment

/*This is a multiple line comment
We are in line 2
Last line of comment*/

/// <summary>
/// Set error message for multilingual language.
/// </summary>