每个派生 table 必须有自己的别名 mysql

Question

我有一个名为 table 的临时

天数

  CREATE TEMPORARY TABLE days (start_date DATETIME)as
  SELECT DATE_ADD(begin_date, INTERVAL n - start_health_post_id DAY) as     
              start_date FROM NOF 
  ORDER BY n
  LIMIT nofdays;

现在我想用一堆执行内部连接的 select 语句进行交叉连接

所以，我尝试了这种方式

Select * from days
cross join
(
Select practices.*, providers.*, practice_locations.*
from practices
Inner Join providers on practices.health_post_id = providers.health_post_id
Inner join practice_locations on practices.health_post_id =practice_locations.health_post_id
);

但它给出了一个错误提示，每个派生的 table 必须有自己的别名。

请帮忙！

Answer 1

为您的子查询设置别名，例如：

Select * from days
cross join
(
Select practices.*, providers.*, practice_locations.*
from practices
Inner Join providers on practices.health_post_id = providers.health_post_id
Inner join practice_locations on practices.health_post_id =practice_locations.health_post_id
) t1;

我将 t1 设置为别名。

每个派生 table 必须有自己的别名 mysql

Every derived table must have its own alias mysql

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