diff --git "a/\350\260\242\351\207\221\351\207\221/\350\260\242\351\207\221\351\207\221\347\254\254\345\233\233\346\254\241\347\254\224\350\256\260\344\275\234\344\270\232/SQLQuery1.sql" "b/\350\260\242\351\207\221\351\207\221/\350\260\242\351\207\221\351\207\221\347\254\254\345\233\233\346\254\241\347\254\224\350\256\260\344\275\234\344\270\232/SQLQuery1.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..39e1a01b00d265b2366e0e9a0a0e3d27f9ecbfdf
--- /dev/null
+++ "b/\350\260\242\351\207\221\351\207\221/\350\260\242\351\207\221\351\207\221\347\254\254\345\233\233\346\254\241\347\254\224\350\256\260\344\275\234\344\270\232/SQLQuery1.sql"
@@ -0,0 +1,39 @@
+--13. 按平均成绩从高到低显示所有学生的所有课程的成绩以及平均成绩
+select sc1.SId,
+(select score from sc where cid='01' and sc.SId=sc1.sid) 语文,
+(select score from sc where cid='02' and sc.SId=sc1.sid) 数学,
+(select score from sc where cid='03' and sc.SId=sc1.sid) 英语,
+AVG(score) 平均成绩 from sc sc1
+group by sid
+order by AVG(score)desc
+--要求输出课程号和选修人数，查询结果按人数降序排列，若人数相同，按课程号升序排列
+select sc.CId,c.Cname,
+(select MAX(score) from sc group by cid having c.CId=sc.CId) 最高分,
+(select MIN(score) from sc group by cid having c.CId=sc.CId) 最低分,
+(select AVG(score) from sc group by cid having c.CId=sc.CId) 平均分,
+((round(cast((sum(case when score >=60  then 1 else 0 end )) as float)/CAST(count(sc.cid) as float),2))*100) 及格率,
+((round(cast((sum(case when score >=70 and score<=80  then 1 else 0 end )) as float)/CAST(count(sc.cid) as float),2))*100) 中等率,
+((round(cast((sum(case when score >=80 and score<=90  then 1 else 0 end )) as float)/CAST(count(sc.cid) as float),2))*100) 优良率,
+((round(cast((sum(case when score >=90 then 1 else 0 end )) as float)/CAST(count(sc.cid) as float),2))*100) 优秀率
+from Course c
+inner join sc on sc.CId=c.CId
+group by sc.CId,c.Cname,c.cid
+
+--15. 按各科成绩进行排序，并显示排名， Score 重复时保留名次空缺
+select *,RANK() over (partition by cid order by score desc) rank from sc 
+--15.1 按各科成绩进行排序，并显示排名， Score 重复时合并名次
+select *,DENSE_RANK() over (partition by cid order by score desc) rank from sc 
+--16. 查询学生的总成绩，并进行排名，总分重复时保留名次空缺
+select s1.SId,(select Sname from Student where Student.sid=s1.SId) 姓名,
+(select score from sc where cid='01' and sc.SId=sc1.sid) 语文,
+(select score from sc where cid='02' and sc.SId=sc1.sid) 数学,
+(select score from sc where cid='03' and sc.SId=sc1.sid) 英语,
+sum(score) 总成绩, RANK() over (order by sum(score) desc) rank from sc sc1
+group by sid
+--16.1 查询学生的总成绩，并进行排名，总分重复时不保留名次空缺
+select sc1.SId,(select Sname from Student where Student.sid=sc1.SId) 姓名,
+(select score from sc where cid='01' and sc.SId=sc1.sid) 语文,
+(select score from sc where cid='02' and sc.SId=sc1.sid) 数学,
+(select score from sc where cid='03' and sc.SId=sc1.sid) 英语,
+sum(score) 总成绩, DENSE_RANK() over (order by sum(score) desc) rank from sc sc1
+group by sid
\ No newline at end of file
diff --git "a/\350\260\242\351\207\221\351\207\221/\350\260\242\351\207\221\351\207\221\347\254\254\345\233\233\346\254\241\347\254\224\350\256\260\344\275\234\344\270\232/\346\216\222\345\272\217\357\274\214\345\205\263\350\201\224\345\255\220\346\237\245\350\257\242.txt" "b/\350\260\242\351\207\221\351\207\221/\350\260\242\351\207\221\351\207\221\347\254\254\345\233\233\346\254\241\347\254\224\350\256\260\344\275\234\344\270\232/\346\216\222\345\272\217\357\274\214\345\205\263\350\201\224\345\255\220\346\237\245\350\257\242.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..63b077e672323a408a7d5ea4db3d27dd5e9c3b70
--- /dev/null
+++ "b/\350\260\242\351\207\221\351\207\221/\350\260\242\351\207\221\351\207\221\347\254\254\345\233\233\346\254\241\347\254\224\350\256\260\344\275\234\344\270\232/\346\216\222\345\272\217\357\274\214\345\205\263\350\201\224\345\255\220\346\237\245\350\257\242.txt"
@@ -0,0 +1,18 @@
+淇濈暀绌虹己
+RANK() over (partition by ** order by  ** desc) rank 
+涓嶄繚鐣欑┖缂�
+DENSE_RANK() over (partition by ** order by ** desc) rank
+鍏宠仈瀛愭煡璇�
+-- 鎵�鏈変粠鏉ユ病鏈変笅杩囧崟鐨勫鎴风殑淇℃伅
+select c_custkey
+from
+  customer
+where
+  not exists (
+    select
+      *
+    from
+      orders
+    where
+      o_custkey = c_custkey
+  )
\ No newline at end of file