Question

我有一个MySQL表，其中有两个字段start_interval和end_interval都存储了表示小时数的int个值。我正在使用此查询从该表中选择记录：

SELECT *
FROM messages
WHERE 23 BETWEEN start_interval AND end_interval;

如果start_interval大于end_interval，我如何获取值？例如start_interval = 22和end_interval = 5？

Answer 1

怎么样：

SELECT * FROM messages
WHERE 23 BETWEEN LEAST(start_interval, end_interval) AND
                GREATEST(start_interval, end_interval);

Answer 2

也许你检查两个方向：

SELECT * FROM messages
WHERE
  (23 BETWEEN start_interval AND end_interval) OR
  (23 BETWEEN end_interval AND start_interval);

Answer 3

…
WHERE 23 BETWEEN start_interval AND end_interval
   OR start_interval > end_interval AND
      23 NOT BETWEEN end_interval + 1 AND start_interval - 1

Answer 4

怎么样：

where 23 between start_interval and if(start_interval>=end_interval,end_interval+24,end_interval)?

两个值desc之间的SQL查询

4 个答案: