我有一个像这样的表"答案":
Id, Registration_id, attendee_id, question_id, answer
12 Reg02 1 1 Paul
13 Reg02 1 2 Smith
14 Reg03 2 1 Rachel
15 Reg03 2 2 Silva
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我的查询是:
Select attendee_id, answer
From wp_events_answer;
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结果我得到了这个:
attendee_id answer
1 Paul
1 Smith
2 Rachel
2 Silva
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但是我想拥有这个:
attendee_id FirstName Name
1 Paul Smith
2 Rachel Silva
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我补充道Group By attendee_id.但它仍然无效.结果它只显示:
attendee_id FirstName
1 Paul
2 Rachel
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你能告诉我什么是错的吗?
谢谢