SQL选择语句，其中，AND，或无法正常工作

Question

大家好，我有以下行作为我的表中的示例

id      shop_id     start_time      end_time
1       21          10:00           11:00

我想检查表中是否存在start_time和end_time我是否正在使用以下查询但不能正常工作，我哪里错了？

select * 
  from usr_booking 
 where shop_id='21' 
   and start_time between '10:10:00' and '11:01:00' 
    or end_time   between '10:10:00' and '11:01:00'

Answer 1

您需要明确区分shop_id上的检查和时间范围：

SELECT *
FROM usr_booking
WHERE
    shop_id = 21 AND
    (start_time BETWEEN '10:10:00' AND '11:01:00' OR
     end_time BETWEEN '10:10:00' AND '11:01:00');

MySQL中的AND运算符优先于OR运算符。所以，您当前的查询实际上正在评估如下：

SELECT *
FROM usr_booking
WHERE
    (shop_id = 21 AND
     start_time BETWEEN '10:10:00' AND '11:01:00') OR
     end_time BETWEEN '10:10:00' AND '11:01:00';

显然，这与您可能想要的逻辑不同。

Answer 2

尝试在此类查询中创建组

select * from usr_booking where shop_id='21' AND ((start_time between '10:10:00' and '11:01:00') OR (end_time between '10:10:00' and '11:01:00'))

添加额外的括号制作组。

Answer 3

试试这个查询：

SELECT *
FROM usr_booking 
Where shop_id='21' AND start_time BETWEEN '10:10:00' AND '11:01:00' 
AND end_time BETWEEN '10:10:00' AND '11:01:00'

Answer 4

试试这个

SELECT * FROM usr_booking WHERE shop_id=21 AND (start_time BETWEEN '10:10:00' AND '11:01:00') OR (end_time BETWEEN '10:10:00' AND '11:01:00')

Answer 5

如果给你时间'10：10：00'和'11：01：00'并且你想知道是否有任何重叠的那个时期，那么逻辑是：

select b.* 
from usr_booking 
where shop_id = 21 and -- do not use single quotes for numeric constants (assuming `shop_id` is a number
      end_time > '10:10:00' and
      start_time < '11:01:00';

对于重叠间隔，between不合适。