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2207/MySQL数据库操作综合练习题答案.md

@@ -505,6 +505,35 @@ INSERT INTO book (bid, bname, bsortno, pressid) VALUES
 (1, '红与黑', 11, 100),
 (2, '幻城', 12, 102),
 (3, '希腊神话', 13, 102);
+
+#5
+SELECT b.*
+FROM book b, press p
+WHERE p.pressid = b.pressid AND p.pressid = 100;
+
+#6
+SELECT b.*
+FROM book b, press p
+WHERE p.pressid = b.pressid AND p.pressname = '外研社';
+
+#7
+SELECT *
+FROM sort s
+WHERE s.scount > 100;
+
+#8
+SELECT p.*
+FROM book b, press p
+WHERE p.pressid = b.pressid
+GROUP BY b.pressid
+HAVING COUNT(*) = (
+	SELECT COUNT(*)
+	FROM book b, press p
+	WHERE p.pressid = b.pressid
+	GROUP BY b.pressid
+	ORDER BY COUNT(*) DESC
+	LIMIT 1
+);
 ```
 
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