CollegeMajorMappingMapper.xml
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<?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.laowu.mapper.CollegeMajorMappingMapper">
<!-- 通用查询映射结果 -->
<resultMap id="BaseResultMap" type="com.laowu.model.CollegeMajorMappingDO">
<id column="id" property="id" />
<result column="create_date" property="createDate" />
<result column="update_date" property="updateDate" />
<result column="delete_date" property="deleteDate" />
<result column="college_id" property="collegeId" />
<result column="major_id" property="majorId" />
</resultMap>
<!-- 通用查询结果列 -->
<sql id="Base_Column_List">
create_date,
update_date,
delete_date,
id, college_id, major_id
</sql>
<select id="collegeMajors" parameterType="long" resultType="com.laowu.vo.major.CollegeMajorsVO">
SELECT
t.id,
t2.id as majorId,
t2.major,
t2.major_code,
t.student_cnt
FROM
college_major_mapping t
LEFT JOIN lib_major t2 ON t.major_id = t2.id
WHERE
t.delete_date is null
and t2.delete_date is null
and t.college_id = #{collegeId}
</select>
</mapper>