diff --git a/2207/MySQL练习题/查询练习.md b/2207/MySQL练习题/查询练习.md
index 0fe2948..0719e0c 100644
--- a/2207/MySQL练习题/查询练习.md
+++ b/2207/MySQL练习题/查询练习.md
@@ -366,11 +366,45 @@ GROUP BY c.id;
 
 #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
 
-#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
 
+#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 sc.`name`, sc.s, @rank:=@rank+1
+FROM (
+	SELECT st.`name`, IFNULL(SUM(sc.score),0) s
+	FROM students st
+	LEFT JOIN scores sc ON st.id = sc.student_id
+	GROUP BY st.id
+	ORDER BY s DESC
+)sc, (SELECT @rank:=0) r;
 #17.统计各科成绩各分数段人数：课程编号，课程名称，[100-85]，[85-70]，[70-60]，[60-0] 及所占百分比
 
 #18.查询各科成绩前三名的记录
+SELECT s1.sname, s1.cname, s1.score, s1.rank1
+FROM (
+	SELECT st.`name` sname, c.`name` cname, sc.score, @rank1:=@rank1+1 rank1
+	FROM students st, scores sc, courses c, (SELECT @rank1:=0) r
+	WHERE st.id = sc.student_id AND c.id = sc.course_id AND course_id = '01'
+	ORDER BY sc.score DESC
+	LIMIT 3
+)s1
+UNION
+SELECT s2.sname, s2.cname, s2.score, s2.rank1
+FROM (
+	SELECT st.`name` sname, c.`name` cname, sc.score, @rank2:=@rank2+1 rank1
+	FROM students st, scores sc, courses c, (SELECT @rank2:=0) r
+	WHERE st.id = sc.student_id AND c.id = sc.course_id AND course_id = '02'
+	ORDER BY sc.score DESC
+	LIMIT 3
+)s2
+UNION
+SELECT s3.sname, s3.cname, s3.score, s3.rank1
+FROM (
+	SELECT st.`name` sname, c.`name` cname, sc.score, @rank3:=@rank3+1 rank1
+	FROM students st, scores sc, courses c, (SELECT @rank3:=0) r
+	WHERE st.id = sc.student_id AND c.id = sc.course_id AND course_id = '03'
+	ORDER BY sc.score DESC
+	LIMIT 3
+)s3;
 
 #19.查询每门课程被选修的学生数