多表查询，字段名重复问题解决

mybatis在进行多表查询的时候遇到多表有重复的列名，会导致查询的结果有误，少赋值，或者错赋值等问题。
尽量减少列名重复，无法避免时可以给列名起别名，用resultMap中的column属性值就是你起的别名，如下

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.scs.dao.StuScoreMapper">
    
    <resultMap id="StuScoreAll" type="com.scs.domain.StuScore">
        <id column="id" property="id"></id>
        <result column="score" property="score"></result>
        <result column="POINT" property="point"></result>
        <result column="log_delete" property="logDelete"></result>
        <result column="VERSION" property="version"></result>
        <association property="student" javaType="com.scs.domain.Student">
            <id column="id" property="id"></id>
            <result column="SName" property="name"></result>
            <result column="SNum" property="num"></result>
            <result column="sex" property="sex"></result>
            <result column="LOG_DELeTE"  property="logDelete"></result>
            <result column="VERSION"   property="version"></result>
        </association>
        <association property="course" javaType="com.scs.domain.Course">
            <id column="id" property="id"></id>
            <result column="CName" property="name"></result>
        </association>
    </resultMap>
    <select id="tPage" resultMap="StuScoreAll">
        SELECT
        stu.name SName,
        stu.num  SNum,
        stu.sex,
        c.name CName,
        ss.score score
         FROM student stu, stuScore ss ,course c
        WHERE ss.st_Id = stu.Id
        and   ss.co_Id = c.id
        <if test="SNum!=null&SNum!='' ">
            and stu.Id = #{SNum}
        </if>
        <if test="SName!=null&SName!='' ">
            and stu.Name like concat('%',#{SName},'%')
        </if>
    </select>


</mapper>

表字段 -> 别名 -> 模型数据类的属性

//column的值就对应别名SName,并将查询的值设置到student的name属性中
 <result column="SName" property="name"></result>
 //给stu表的name字段起别名
SELECT
stu.name SName,