MYSQL 从另一个查询导入的多个“或”条件

Question

是否可以创建具有多个 OR 条件的查询，例如：

SELECT
  *
FROM
  trans 
WHERE 
  (web = 'web1' AND date BETWEEN ('first_date1' AND 'last_date1') OR 
  (web = 'web2' AND date BETWEEN ('first_date2' AND 'last_date2') OR 
  (web = 'web3' AND date BETWEEN ('first_date3' AND 'last_date3') OR
  (web = 'web4' AND date BETWEEN ('first_date4' AND 'last_date4') OR
  ...
  ...
WHERE 
  something1

我可以从另一个表的另一个查询中获取 WHERE 子句中的“或行”：

SELECT id, web, first_date, last_date
FROM
  alerts 
WHERE 
  something2

所以这最后一个查询会给我一个像这样的表：

+-----+------+-------------+------------+
| ID  | web  | first_date  | last_date  |
+-----+------+-------------+------------+
| 23  | web1 | first_date1 | last_date1 |
+-----+------+-------------+------------+
| 2   | web2 | first_date2 | last_date2 |
+-----+------+-------------+------------+
| 33  | web3 | first_date3 | last_date3 |
+-----+------+-------------+------------+
| 5   | web4 | first_date4 | last_date4 |
+-----+------+-------------+------------+
| ... | ...  | ...         | ...        |
+-----+------+-------------+------------+

所以我在第一个查询中想要的结果就像从前一个表的每行执行一个查询，比如：

SELECT * FROM trans 
WHERE web = 'web1' AND date BETWEEN ('first_date1' AND 'last_date1')

SELECT * FROM trans 
WHERE web = 'web2' AND date BETWEEN ('first_date2' AND 'last_date2')

and so on ...

Answer 1

如果我跟你说得对，你可以使用exists ：

select t.*
from trans t
where exists (
    select 1
    from alerts a
    where 
        <something>
        and t.id = a.id
        and t.web = a.web
        and t.date between t.first_date and t.last_date
)

Answer 2

它看起来像 JOIN 问题：

SELECT
  trans.*, a.alert_id
FROM
  trans t
JOIN 
 (
   SELECT id as alert_id, web, first_date, last_date 
   FROM  alerts 
   WHERE 
   something2
 ) as  ON (
   a.web = t.web1 AND 
   t.date BETWEEN (a.first_date1 AND a.last_date1)
 )
WHERE 
  something