core/DB.php
public static function execute(string $sql, $args = null)
    {
        return self::engine()->execute($sql, $args);
    }
public static function execute(string $sql, $args = null)
    {
        return self::engine()->execute($sql, $args);
    }
执行sql 语句
@param string $sql
@param null $args
@return bool|\PDOStatement
@throws MysqlException