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2208/天天乐学考试答案/MySQL练习（一）.md

@@ -366,6 +366,22 @@ BEGIN
 	END IF;
 END $$
 DELIMITER ;
+
+#10
+DELIMITER $$
+DROP PROCEDURE IF EXISTS pro_GetTopStudent;
+CREATE PROCEDURE pro_GetTopStudent(IN in_cid CHAR(11), OUT out_stuname VARCHAR(50))
+BEGIN 
+	SELECT st.stuname INTO out_stuname
+	FROM tb_students st, tb_scores sc
+	WHERE st.stuid = sc.student_id AND sc.course_id = in_cid
+	ORDER BY sc.score DESC
+	LIMIT 1;
+END $$
+DELIMITER ;
+
+CALL pro_GetTopStudent(1, @result);
+SELECT @result;
 ```