refactor: 更改子查询为join

src/main/resources/mapper/app/UserDao.xml

@@ -136,7 +136,6 @@
     </select>
 
      <select id="queryCourseOrder" resultType="com.sqx.modules.app.response.CourseOrderResponse">
-        select * from (
          select c.course_id  as courseId,sum(o.pay_money) as 'coursemoney' ,count(*) as 'coursenum',any_value(c.title) as 'coursename'
          from orders o
          left join course c on o.course_id=c.course_id
@@ -154,8 +153,7 @@
              and date_format(o.create_time,'%Y')=date_format(#{date},'%Y')
          </if>
      group by c.course_id
-         ) a
-     order by a.coursenum desc
+     order by coursenum desc
      </select>
      <select id="userMessage" resultType="int">
        select count(*) from tb_user t
@@ -335,4 +333,4 @@
     </update>
 
 
-</mapper>
+</mapper>

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

@@ -6,6 +6,34 @@
 
     <select id="selectCourseByCollect" resultType="com.sqx.modules.course.entity.Course">
         SELECT
+            MAX(u.update_time) AS produceEndTime,
+            c.*,
+            d1.course_details_name AS courseDetailsName,
+            d1.course_details_id AS courseDetailsId,
+            COUNT(d2.course_details_id) AS courseDetailsCount
+        FROM
+            course_collect u
+                LEFT JOIN
+            course c ON u.course_id = c.course_id
+                LEFT JOIN
+            course_collect cc1 ON cc1.course_id = u.course_id
+                AND cc1.classify = 3
+                AND cc1.user_id = #{userId}
+                LEFT JOIN
+            course_details d1 ON cc1.course_details_id = d1.course_details_id
+                LEFT JOIN
+            course_details d2 ON d2.course_id = c.course_id
+        WHERE
+            u.user_id = #{userId}
+          AND c.course_id IS NOT NULL
+          AND u.classify = #{classify}
+        GROUP BY
+            u.course_id, c.course_id
+        ORDER BY
+            produceEndTime DESC;
+
+
+ <!--       SELECT
             MAX( u.update_time ) AS produceEndTime,
             c.*,
             (
@@ -46,6 +74,7 @@
             u.course_id
         ORDER BY
             produceEndTime DESC
+            -->
     </select>
 
-</mapper>
+</mapper>

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

@@ -7,6 +7,103 @@
         where course_id = #{id}
     </update>
     <select id="selectCourse" resultType="Map">
+
+        SELECT
+        c.classify_id AS classifyId,
+        c.course_id AS courseId,
+        c.course_label AS courseLabel,
+        c.create_time AS createTime,
+        c.details,
+        c.img,
+        c.banner_img AS bannerImg,
+        c.status,
+        c.is_delete AS isDelete,
+        c.msg_type AS msgType,
+        c.msg_url AS msgUrl,
+        c.pay_num AS payNum,
+        c.price,
+        c.wholesale_price AS wholesalePrice,
+        c.is_over AS isOver,
+        c.title,
+        c.is_price AS isPrice,
+        c.title_img AS titleImg,
+        c.update_time AS updateTime,
+        cc.classification_name AS classificationName,
+        c.course_type AS courseType,
+        c.banner_id AS bannerId,
+        b.name AS bannerName,
+        0 AS viewCounts,
+        c.dy_img_id AS dyImgId,
+        c.dy_course_id AS dyCourseId,
+        c.wx_course_id AS wxCourseId,
+        c.wx_show AS wxShow,
+        c.dy_show AS dyShow,
+        c.sort,
+        0 AS goodNum,
+        d.courseDetailsCount,
+        NULL AS courseDetailsName,
+        NULL AS courseDetailsId,
+        0 AS weekGoodNum,
+        0 AS isRecommend
+        FROM
+        course AS c
+        LEFT JOIN
+        course_classification AS cc ON c.classify_id = cc.classification_id
+        LEFT JOIN
+        banner AS b ON b.id = c.banner_id
+        LEFT JOIN
+        (SELECT course_id, COUNT(*) AS courseDetailsCount FROM course_details GROUP BY course_id) AS d
+        ON c.course_id = d.course_id
+        WHERE
+        c.is_delete = 0
+        <if test='null != wxShow and wxShow == 1'>
+            AND c.wx_show = #{wxShow}
+        </if>
+        <if test='null != wxShow and wxShow == 2'>
+            AND (c.wx_show = #{wxShow} OR c.wx_show IS NULL)
+        </if>
+        <if test='null != dyShow and dyShow == 1'>
+            AND c.dy_show = #{dyShow}
+        </if>
+        <if test='null != dyShow and dyShow == 2'>
+            AND (c.dy_show = #{dyShow} OR c.dy_show IS NULL)
+        </if>
+        <if test='null != title'>
+            AND c.title LIKE CONCAT('%', #{title}, '%')
+        </if>
+        <if test='null != classifyId and classifyId != 0'>
+            AND c.classify_id = #{classifyId}
+        </if>
+        <if test='null != bannerId and bannerId != 0'>
+            AND c.banner_id = #{bannerId}
+        </if>
+        <if test="classifyId == 0">
+            AND c.is_recommend = 1
+        </if>
+        <if test="over != null">
+            AND c.is_over = #{over}
+        </if>
+        <if test="isRecommend != null and isRecommend != -1">
+            AND c.course_id IN (SELECT course_id FROM course_details WHERE good = 1)
+        </if>
+        <if test="status != null and status != 0">
+            AND c.status = #{status}
+        </if>
+        <if test="isPrice != null">
+            AND c.is_price = #{isPrice}
+        </if>
+        <if test="wxCourse != null">
+            AND c.wx_course_id IS NOT NULL
+        </if>
+        <if test="dyCourse != null">
+            AND c.dy_status = 4
+        </if>
+        ORDER BY
+        c.sort ASC, c.create_time DESC;
+
+
+        <!--
+
         SELECT
         c.classify_id as classifyId,
         c.course_id as courseId,
@@ -94,7 +191,8 @@
             and c.dy_status=4
         </if>
         order by c.sort asc,c.create_time desc
-        <!--
+
+        分割线
         <if test="sort==null">
             order by c.sort asc
         </if>