在这个表中
mysql> select * from classics;
+--------------------------+------------------------------+-----------------+------+-------+---------------+
| author | title | category | year | pages | isbn |
+--------------------------+------------------------------+-----------------+------+-------+---------------+
| Mark Twain (S.L.Clemens) | the adventures of tom sawyer | Classic Fiction | 1876 | 65535 | |
| Charles Dickens | A Christmas Carol | Classic Fiction | 1849 | 50 | 23423664 |
| NULL | NULL | NULL | NULL | NULL | 23242362346 |
+--------------------------+------------------------------+-----------------+------+-------+---------------+
如何删除最后一行并设置第一行的isbn编号?我正在尝试这样的事情:
alter table classics drop ?? where author=NULL;
insert into classics(isbn) values('234525246') where title like "%adventures%";
如何正确执行此操作?