使用设置整数的格式。作为千位分隔符，不带小数

let number = 1000000;
let formattedNumber = number.toLocaleString();
console.log(formattedNumber); // 输出：1,000,000

number = 1000000
formatted_number = "{:,}".format(number)
print(formatted_number)  # 输出：1,000,000

import java.text.DecimalFormat;

int number = 1000000;
DecimalFormat decimalFormat = new DecimalFormat("#,###");
String formattedNumber = decimalFormat.format(number);
System.out.println(formattedNumber); // 输出：1,000,000

int number = 1000000;
string formattedNumber = number.ToString("#,###");
Console.WriteLine(formattedNumber); // 输出：1,000,000

SELECT FORMAT(1000000, 0) AS formatted_number;
-- 输出：1,000,000

SELECT FORMAT(1000000, 'N0') AS formatted_number;
-- 输出：1,000,000

SELECT TO_CHAR(1000000, '999,999,999') AS formatted_number FROM DUAL;
-- 输出：1,000,000