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select t1.id, t1.type, t1.question_id, t1.name, t1.score, t1.display, if (t2.id is null, 0, 1) as choose , if(t2.type = 3, null, t2.answer) as answer |
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select t1.id, t1.type, t1.question_id, t1.name, t1.score, t1.display, if (t2.id is null, 0, 1) as choose , if(t2.type = 3, null, t2.answer) as answer |