Question

在我的mysql查询中，有一堆带有一个OR语句的AND条件。但我需要修改我的代码，使得我的两个给定日期中的任何一个在t2.start_id和t2.end_id之间，并且仍然与其他AND语句进行AND运算。

现在，我的OR语句执行并且没有检查其他AND语句

SELECT * 
FROM med_files t1 Inner Join med_users t2 ON t1.med_id = t2.id 
WHERE t1.med_id in  (54810,54812,54813,54811)  AND t2.user_id <> 6 AND  
              '2014-07-16 00:00:00' between t2.start_id AND  t2.end_id OR 
              '2014-07-17 09:54:00' between t2.start_id AND  t2.end_id'

Answer 1

使用括号来描述两个检查中的每个检查之间的界限，如下所示：

AND t2.user_id <> 6 
AND --Either of the two should be true
(
 ('2014-07-16 00:00:00' between t2.start_id AND  t2.end_id) 
 OR   
 ('2014-07-17 09:54:00' between t2.start_id AND  t2.end_id)
)

Answer 2

您必须使用括号来分隔AND＆amp; OR

试试这个

SELECT * 
FROM med_files t1 INNER JOIN med_users t2 ON t1.med_id = t2.id 
WHERE t1.med_id IN (54810,54812,54813,54811)  AND t2.user_id <> 6 AND  
              (('2014-07-16 00:00:00' between t2.start_id AND  t2.end_id) OR 
               ('2014-07-17 09:54:00' between t2.start_id AND  t2.end_id))

Answer 3

括号将完成工作，他们控制你的AND和OR的优先级，并将它们组合在一起：

where 
  t1.med_id in (54810,54812,54813,54811)  
  AND t2.user_id <> 6 
  AND  ('2014-07-16 00:00:00' between t2.start_id AND  t2.end_id 
  OR '2014-07-17 09:54:00' between t2.start_id AND  t2.end_id')

在WHERE子句中使用AND和OR运算符

3 个答案: