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