如何一次显示一行，如果所有的数据都是一样

Question

我有下面的查询：

$questionquery = " 
SELECT DISTINCT q.QuestionContent, o.OptionType, q.NoofAnswers, GROUP_CONCAT(DISTINCT Answer ORDER BY Answer SEPARATOR '') AS Answer, r.ReplyType, 
q.QuestionMarks, q.SessionId 
FROM Answer an 
INNER JOIN Question q ON q.QuestionId = an.QuestionId and an.SessionId = q.SessionId 
JOIN Reply r ON q.ReplyId = r.ReplyId 
JOIN Option_Table o ON q.OptionId = o.OptionId 
WHERE ".implode(" AND ", array_fill(0, $numTerms, "q.QuestionContent LIKE ?"))." 
GROUP BY an.SessionId, an.QuestionId 
ORDER BY ".implode(", ", array_fill(0, $numTerms, "IF(q.QuestionContent LIKE ?, 1, 0) DESC"))." 
"; 

现在下面是每个数据库表的样子：

会话表：

SessionId SessionName 
1   AAA 
2   AAB 
3   AAC 

Question Table：

SessionId QuestionId QuestionContent    ReplyId OptionId 
1   1   Here is a single answer  2  1 
2   3   Here is a single answer  2  1 
3   3   Here is a single answer  2  1 

Answe R表：

AnswerId SessionId QuestionId Answer 
1   1   1   True 
2   2   3   True 
3   3   3   True 

回复表：

ReplyId ReplyType 
1  Single 
2  Multiple 

选项表：

OptionId OptionType 
1   True or False 

现在我收到的问题是，在数据库中，我有一个是完全的三个问题相同的答案，相同的标记，相同的选项类型等，都是一样的，这是很好的。但在查询中，我想要做的是，如果有多个行的列都匹配，那么只显示一次。因此，在目前它在下面的查询输出显示此：

Here is a single answer  True or False 1 True Multiple 5 
Here is a single answer  True or False 1 True Multiple 5 
Here is a single answer  True or False 1 True Multiple 5 

但随着问题的所有细节是一样的，它应该只显示一次象下面这样：

Here is a single answer  True or False 1 True Multiple 5 

如何如果存在具有完全相同数据的多行，我可以使查询显示一行吗？

UPDATE：

$questionquery = " 
SELECT DISTINCT q.QuestionContent, o.OptionType, q.NoofAnswers, Answer, r.ReplyType, 
q.QuestionMarks 
FROM 
(
SELECT DISTINCT q.QuestionContent, o.OptionType, q.NoofAnswers, GROUP_CONCAT(DISTINCT Answer ORDER BY Answer SEPARATOR '') AS Answer, r.ReplyType, 
q.QuestionMarks, q.SessionId 
FROM Answer an 
INNER JOIN Question q ON q.QuestionId = an.QuestionId and an.SessionId = q.SessionId 
JOIN Reply r ON q.ReplyId = r.ReplyId 
JOIN Option_Table o ON q.OptionId = o.OptionId 
WHERE ".implode(" AND ", array_fill(0, $numTerms, "q.QuestionContent LIKE ?"))." 
GROUP BY an.SessionId, an.QuestionId 
) 
AS tmpresult 
ORDER BY ".implode(", ", array_fill(0, $numTerms, "IF(q.QuestionContent LIKE ?, 1, 0) DESC"))." 
"; 

Answer 1

强大是疯狂的想法，但仍值得尝试，从你的主要查询中做一个子查询并用DISTINCT做另一个选择：

SELECT DISTINCT {yourcolumns} 
FROM 
(
     your current code 
) as tmp 

Answer 2

展开您的GROUP BY条款添加这些列由要考虑的行作为重复类似下面

GROUP BY an.SessionId, an.QuestionId, QuestionContent, 
     OptionType, q.NoofAnswers, Answer, q.QuestionMarks