From 649f8f0c3f49b4d54f0c99c383126365e7cc9136 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BC=A0=E6=9D=BE?=
 <8605635+zhang3064194730@user.noreply.gitee.com>
Date: Mon, 30 Dec 2024 21:04:18 +0800
Subject: [PATCH] =?UTF-8?q?refactor:=20=E6=9B=B4=E6=94=B9=E5=AD=90?=
 =?UTF-8?q?=E6=9F=A5=E8=AF=A2=E4=B8=BAjoin?=
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---
 src/main/resources/mapper/course/CourseDao.xml | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/main/resources/mapper/course/CourseDao.xml b/src/main/resources/mapper/course/CourseDao.xml
index 98d4f032..73220854 100644
--- a/src/main/resources/mapper/course/CourseDao.xml
+++ b/src/main/resources/mapper/course/CourseDao.xml
@@ -47,8 +47,16 @@
         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) d.course_id = c.course_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 d.course_id = c.course_id
         WHERE
         1 = 1
         AND c.is_delete = 0