php - MySQL 'OR' 语句 - 确定哪个部分返回行

Question

我有以下 MySQL SELECT 语句(连同 PHP):

SELECT *
FROM EVENTS
WHERE (
 time1
 BETWEEN "2013-04-22 19:30:00"
 AND "2013-04-22 19:50:00"
)
OR (
 time2
   BETWEEN "2013-04-22 19:30:00"
   AND "2013-04-22 19:50:00"
)

上述查询返回以下行:

    id   |        time1        |       time2        |
   -------------------------------------------------
    26     2013-04-22 19:45:00  2013-04-26 12:25:00

所以，很明显，time1 是返回行的原因。

我的问题是:当我使用上面的 SELECT 语句遍历行时，我如何确定是 time1 还是 time2 “触发”(由于缺少更好的术语)要返回的行？

任何帮助都会很棒!

Answer 1

SELECT  *,
        IF(time1 BETWEEN "2013-04-22 19:30:00" AND "2013-04-22 19:50:00", 
          'Time1', 'Time2')  Result
FROM    EVENTS
WHERE   time1 BETWEEN "2013-04-22 19:30:00" AND "2013-04-22 19:50:00" OR
        time2 BETWEEN "2013-04-22 19:30:00" AND "2013-04-22 19:50:00"

名为 Result 的附加列只是测试条件返回 true 的列。例如，如果两者都返回 true，则只有 time1 会出现在 result 列上。

更新 1

SELECT  *,
        CASE
            WHEN time1 BETWEEN '2013-04-22 19:30:00' AND '2013-04-22 19:50:00' AND 
                 time2 BETWEEN '2013-04-22 19:30:00' AND '2013-04-22 19:50:00'
            THEN 'Time1 and Time2'
            WHEN time1 BETWEEN '2013-04-22 19:30:00' AND '2013-04-22 19:50:00' 
            THEN 'Time1'
            ELSE 'Time2'
        END Result
FROM    EVENTS
WHERE   time1 BETWEEN '2013-04-22 19:30:00' AND '2013-04-22 19:50:00' OR
        time2 BETWEEN '2013-04-22 19:30:00' AND '2013-04-22 19:50:00'