我试图让一个解释命令在

mysql中工作.我正在尝试解决此删除查询的性能问题：

DELETE FROM boost_cache_relationships

WHERE base_dir = 'cache/normal/www.dane101.com'

AND page_callback = 'node'

AND page_type = 'story'

AND page_id = '2891';

此查询是SHOW FULL PROCESSLIST命令的输出.

我知道EXPLAIN不能用于删除,所以我复制它并用SELECT替换DELETE来提供以下内容：

explain select

FROM boost_cache_relationships

WHERE base_dir = 'cache/normal/www.dane101.com'

AND page_callback = 'node'

AND page_type = 'story'

AND page_id = '2891';

当我按Enter键时,mysql给我一条错误消息,告知这是无效的SQL：

ERROR 1064 (42000): You have an error in your SQL syntax; check the

manual that corresponds to your MySQL server version for the right

syntax to use near ‘FROM boost_cache_relationships WHERE base_dir =

‘cache/normal/www.dane101.com’ A’ at line 1

我究竟做错了什么？