解决mysql数据重复问题

Mysql点滴－where clause is ambiguous

<select id="ibatorgenerated_selectMyAnswersByExample" resultMap="ibatorgenerated_BaseResultMap" parameterClass="com.yzy.admin.bo.QuestionCriteria" >
SELECT yzy_question.id, yzy_question.user_id, yzy_question.question_title, yzy_question.question_labels, yzy_question.create_time,
yzy_question.question_two, yzy_question.question_pageview, yzy_question.question_answernum
FROM yzy_question
inner join yzy_quanswer ON yzy_question.id = yzy_quanswer.question_id
<isParameterPresent >
<include refid="yzy_question.ibatorgenerated_Example_Where_Clause" />
<isNotNull property="orderByClause" >
order by $orderByClause$
</isNotNull>
<isNotNull property="limit" >
limit $limit$
</isNotNull>
<isNotNull property="offset" >
offset $offset$
</isNotNull>
</isParameterPresent>
GROUP BY yzy_question.id
</select>

//由于关联表，所以增加此方法
public Criteria andQuanswerUserIdEqualTo(Long value) {
addCriterion("yzy_quanswer.user_id =", value, "Quanswer.userId");
return this;
}