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2208/天天乐学考试答案/MySQL练习（一）.md

@@ -160,21 +160,18 @@ WHERE h.hid = r.hid AND r.price =(
 
 #8 触发器
 DELIMITER $$
-DROP TRIGGER IF EXISTS tri_updateInteroduce;
-CREATE TRIGGER tri_updateInteroduce
+DROP TRIGGER IF EXISTS tri_updateIntroduce;
+CREATE TRIGGER tri_updateIntroduce
 BEFORE UPDATE ON t_hotel
 FOR EACH ROW
 BEGIN
-	IF NEW.`level` <> OLD.`level` THEN
-		IF NEW.`level` IN ('一星', '二星') THEN
+		IF NEW.`level` = '一星' OR NEW.`level` = '二星' THEN
 			SET NEW.introduce = '实用';
-		ELSEIF NEW.`level` IN ('三星', '四星') THEN
+		ELSEIF NEW.`level` = '三星' OR  NEW.`level` = '四星' THEN
 			SET NEW.introduce = '豪华';
-		ELSE
+		ELSEIF NEW.`level` = '五星' THEN
 			SET NEW.introduce = '奢华';
 		END IF;
-	END IF;
-
 END $$
 DELIMITER ;
 
@@ -188,8 +185,12 @@ BEGIN
 	WHERE h.hid = r.hid AND r.rname = in_rname
 	ORDER BY r.price
 	LIMIT 1;
-
 END $$
 DELIMITER ;
+
+CALL pro_GetLowPrice('标准间', @result);
+SELECT @result;
 ```
 
+### 第三套
+