收藏中心 多少集

src/main/resources/mapper/course/CourseCollectDao.xml

@@ -30,5 +30,15 @@
         FROM course_collect
         WHERE user_id = #{userId};
     </select>
-
+    <select id="selectClassify1In3" resultType="com.sqx.modules.course.entity.Course">
+        SELECT
+            c1.course_id as courseId,
+            c1.course_details_id as courseDetailsId
+        FROM
+            `course_collect` c1
+                INNER JOIN course_collect c2 ON c1.course_id = c2.course_id AND c2.user_id = #{userId} AND c2.classify = 1
+        WHERE
+            c1.classify = 3
+          AND c1.user_id = #{userId}
+    </select>
 </mapper>

src/main/resources/mapper/course/CourseDetailsDao.xml

@@ -108,8 +108,10 @@
         SELECT course_id as courseId,
                COUNT(*)  AS courseDetailsCount
         FROM course_details
-        where course_details_id
-
+        where course_details_id in
+        <foreach collection="courseIdList" item="ids" open="(" separator="," close=")">
+            #{ids}
+        </foreach>
         GROUP BY course_id
     </select>