MySQL database update update subquery

比如：


UPDATE test.tb_vobile a
set a.name = '111 '
WHERE
a.id = (select max(id) id from test.tb_vobile)
报错：



[SQL]UPDATE test.tb_vobile a
set a.name = '111 '
WHERE
a.id = (select max(id) id from test.tb_vobile)


[Err] 1093 - You can't specify target table 'a' for update in FROM clause


以下可通过：


UPDATE test.tb_vobile a
join
(select max(id) id from test.tb_vobile) b
on a.id = b.id
set a.name = '123 ';
或

UPDATE test.tb_vobile a ,(select max(id) id from test.tb_vobile) b
set a.name = '321 '
WHERE
a.id = b.id ;
说明：

1. During update, the updated table cannot be used for sub-queries in set and where;
2. During update, multiple tables can be updated (sqlserver cannot);
such as: update ta a,tb b set a.Bid=b .id ,b.Aid=a.id;
3. Any query can be done after update, which is equivalent to from;