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2207/MySQL数据库操作综合练习题答案.md

@@ -386,6 +386,30 @@ INSERT INTO Records (姓名, 记录) VALUES
 ![image-20250315230025538](https://yp.smallkun.cn/markdown/image-20250315230025538.png!compress)
 
 ```sql
+#3
+UPDATE score s
+SET s.`语文` = 88
+WHERE s.`姓名` = '张三';
+
+#4
+SELECT AVG(s.`英语`), AVG(s.`数学`), AVG(s.`语文`)
+FROM classes c, score s
+WHERE c.`姓名` = s.`姓名` AND c.`班级` = 1 AND c.`专业` = '计算机维护';
+
+#5
+SELECT *
+FROM score s
+WHERE s.`数学` < 60 OR s.`英语` < 60 OR s.`语文` < 60;
+
+#6
+SELECT *
+FROM score s
+WHERE s.`姓名` IN (
+	SELECT r.`姓名`
+	FROM records r
+	GROUP BY r.`姓名`
+	HAVING COUNT(*) > 2
+);
 ```
 
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