From df4fea34373a4b2d07912dbdf1ab51ea0c93c839 Mon Sep 17 00:00:00 2001
From: smallkun <smallerkun@foxmail.com>
Date: Tue, 18 Mar 2025 19:41:55 +0800
Subject: [PATCH] Auto commit

---
 2207/MySQL数据库操作综合练习题答案.md | 45 +++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/2207/MySQL数据库操作综合练习题答案.md b/2207/MySQL数据库操作综合练习题答案.md
index 9c222b0..f3306bb 100644
--- a/2207/MySQL数据库操作综合练习题答案.md
+++ b/2207/MySQL数据库操作综合练习题答案.md
@@ -578,5 +578,50 @@ INSERT INTO travel (tid, time, position, money, aid, count) VALUES
 (1, '5天', '八达岭', 3000, 101, 10),
 (2, '7天', '水长城', 5000, 101, 14),
 (3, '8天', '水长城', 6000, 102, 11);
+
+#4
+SELECT a.*
+FROM travel t, agency a
+WHERE t.aid =a.id
+GROUP BY a.id
+HAVING COUNT(*) = (
+	SELECT COUNT(*)
+	FROM travel t, agency a
+	WHERE t.aid =a.id
+	GROUP BY a.id
+	ORDER BY COUNT(*) DESC
+	LIMIT 1
+);
+
+#5
+SELECT t.*
+FROM travel t
+WHERE t.count = (
+	SELECT t.count
+	FROM travel t
+	ORDER BY t.count DESC
+	LIMIT 1
+);
+
+#6
+SELECT *
+FROM travel t
+WHERE t.money < 5000;
+
+#7
+SELECT a.`name`
+FROM travel t, agency a
+WHERE t.aid =a.id AND t.money = (
+	SELECT t.money
+	FROM travel t, agency a
+	WHERE t.aid =a.id
+	ORDER BY t.money DESC
+	LIMIT 1
+);
+
+#8
+SELECT SUM(t.time)
+FROM travel t, agency a
+WHERE t.aid =a.id AND a.`name` = '青年旅行社';
 ```