<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<mapper namespace="com.gkhy.exam.system.mapper.ExExerciseAnswerMapper">
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<delete id="clearExerciseRecord">
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delete from ex_exercise_answer where bank_id=#{bankId} and student_id=#{studentId}
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</delete>
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<select id="getExerciseAnswer" resultType="com.gkhy.exam.system.domain.ExExerciseAnswer">
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select * from ex_exercise_answer where bank_id=#{bankId} and qustion_id=#{questionId} and student_id=#{studentId} limit 1
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</select>
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</mapper>
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