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src/main/resources/mapper/course/CourseUserDao.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.sqx.modules.course.dao.CourseUserDao">
+
+    <select id="selectLatelyCourse" resultType="com.sqx.modules.course.entity.Course">
+        select c.*,(select count(*) from course_user cu where cu.course_id=u.course_id) as courseCount,
+               (select group_concat(avatar) from
+                   (SELECT tu.avatar,course_id FROM course_user o
+                    left join tb_user tu on tu.user_id=o.user_id
+                    GROUP BY course_id,tu.avatar
+                        limit 3
+                   ) a where a.course_id=u.course_id ) as avatar from course_user u
+        left join course c on u.course_id=c.course_id
+        where u.user_id=#{userId} and c.is_delete=0 order by update_time desc
+    </select>
+
+    <select id="selectCourseByCourseUser" resultType="com.sqx.modules.course.entity.Course">
+        select c.*,(select count(*) from course_user cu where cu.course_id=u.course_id) as courseCount,
+               (select group_concat(avatar) from
+                   (SELECT tu.avatar,course_id FROM course_user o
+                    left join tb_user tu on tu.user_id=o.user_id
+                    GROUP BY course_id,tu.avatar
+                        limit 3
+                   ) a where a.course_id=u.course_id ) as avatar
+        from course_user u
+        left join course c on u.course_id=c.course_id
+        where u.user_id=#{userId} and c.is_delete=0
+        order by u.create_time desc
+    </select>
+
+    <select id="selectCourseUser" resultType="com.sqx.modules.course.entity.CourseUser">
+     select * from course_user u where u.user_id=#{userId} and u.course_id=#{id} and u.classify=1
+    </select>
+
+    <select id="selectCourseUserList" resultType="com.sqx.modules.course.entity.CourseUser">
+        select * from course_user u where u.user_id=#{userId} and u.course_id=#{id} and u.classify=2
+    </select>
+
+    <update id="updateCourseTime">
+        update  course_user   set update_time =#{courseUser.updateTime}
+    </update>
+
+    <delete id="deleteCourseUserByVipUser">
+        delete from course_user where order_id in (select orders_id from orders where user_id= #{userId} and pay_way=5 and status=1)
+    </delete>
+
+</mapper>