core/DB.php
public static function update(string $tbname, array $values, $where = null, $args = null)
    {
        return self::engine()->update($tbname, $values, $where, $args);
    }
public static function update(string $tbname, array $values, $where = null, $args = null)
    {
        return self::engine()->update($tbname, $values, $where, $args);
    }
更新记录集
@param string $tbname
@param array $values
@param null $where
@param null $args
@throws MysqlException