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Question

我有以下MySQL查询：

(
SELECT act_id, act_date, act_score 
FROM actsWithScore 
WHERE user_id = '1' 
) 
UNION ALL (

SELECT act_id, vote_date, vote_score 
FROM votes 
WHERE user_voter = '1' 
) 
ORDER BY `act_date` 

这个伟大的工程和类似以下的输出：

act_id  act_date    act_score 
31   2014-03-06 07:08:12  NULL 
30   2014-03-06 07:07:51  NULL 
23   2014-03-06 06:52:54  1 
21   2014-03-06 06:52:48  -1 
12   2014-03-06 06:52:46  1 
25   2014-03-06 06:52:42 -1 

我想要做什么被标识在输出哪一行是一种行为（从SELECT ... FROM actsWithScore查询），并且该行是一票（从SELECT ... FROM votes查询）像这样：

act_id  act_date    act_score decription 
31   2014-03-06 07:08:12  NULL   act 
30   2014-03-06 07:07:51  NULL   act 
23   2014-03-06 06:52:54  1   vote 
21   2014-03-06 06:52:48  -1   act 
12   2014-03-06 06:52:46  1   vote 
25   2014-03-06 06:52:42 -1   vote 

这是可能的，如果是这样，怎么样？谢谢:)

Answer 1

(
SELECT act_id, act_date, act_score, 'act' as description 
FROM actsWithScore 
WHERE user_id = '1' 
) 
UNION ALL 
(

SELECT act_id, vote_date, vote_score, 'votes' as description 
FROM votes 
WHERE user_voter = '1' 
) 
ORDER BY `act_date` 

Answer 2

只要做到这样

(
SELECT act_id, act_date, act_score, 'Act' As description 
FROM actsWithScore 
WHERE user_id = '1' 
) 
UNION ALL (

SELECT act_id, vote_date, vote_score, 'Vote' As description 

FROM votes 
WHERE user_voter = '1' 
) 
ORDER BY `act_date`