From 1b42d49ba9ea1532d5ef9224ea71c3b0d6a31643 Mon Sep 17 00:00:00 2001
From: smallkun <smallerkun@foxmail.com>
Date: Thu, 20 Mar 2025 18:57:01 +0800
Subject: [PATCH] Auto commit

---
 2207/触发器练习题.md | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/2207/触发器练习题.md b/2207/触发器练习题.md
index 08a557b..77ae40a 100644
--- a/2207/触发器练习题.md
+++ b/2207/触发器练习题.md
@@ -120,6 +120,35 @@ SET MESSAGE_TEXT = '错误消息';
 
 创建一个触发器 `before_employee_insert`，在插入 `employee` 表数据之前，检查员工的工资是否在其对应职位的 `min_salary` 和 `max_salary` 范围内。如果超出范围，阻止插入并抛出错误。
 
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_employee_insert;
+CREATE TRIGGER before_employee_insert
+BEFORE INSERT ON employee
+FOR EACH ROW
+BEGIN
+
+	IF NEW.salary < (
+		SELECT j.max_salary
+		FROM job j
+		WHERE j.job_id = NEW.job_id
+	) OR NEW.salary > (
+		SELECT j.min_salary
+		FROM job j
+		WHERE j.job_id = NEW.job_id
+	) THEN
+		SIGNAL SQLSTATE '45000'
+		SET MESSAGE_TEXT = '工资值错误，不在职务工资范围内';
+	END IF;
+END $$
+DELIMITER ;
+
+INSERT INTO employee
+VALUES(DEFAULT, '雷昊', 0, NOW(), 1, 1);
+```
+
+
+
 #### 练习题 2: 自动更新部门人数
 
 创建一个触发器 `after_employee_insert`，在插入 `employee` 表数据之后，自动更新 `department` 表中的部门人数（假设 `department` 表新增一个字段 `employee_count`）。