From 727db1bb4a17728f2b6913bbfe7fc2799dc217c5 Mon Sep 17 00:00:00 2001
From: smallkun <smallerkun@foxmail.com>
Date: Fri, 21 Mar 2025 09:35:23 +0800
Subject: [PATCH] Auto commit

---
 2207/触发器练习题.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/2207/触发器练习题.md b/2207/触发器练习题.md
index b173b97..7f08032 100644
--- a/2207/触发器练习题.md
+++ b/2207/触发器练习题.md
@@ -567,6 +567,19 @@ DELIMITER ;
 创建一个触发器 `before_employee_insert`，在插入 `employee` 表数据时，自动生成一个唯一的员工编号（格式为 `EMP-年份-序号`，例如 `EMP-2023-001`），并将其存储到一个新字段 `emp_code` 中。
 
 ```sql
+ALTER TABLE employee ADD emp_code VARCHAR(30);
+
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_employee_insert;
+CREATE TRIGGER before_employee_insert
+BEFORE INSERT ON employee
+FOR EACH ROW
+BEGIN
+	SET NEW.emp_code = CONCAT('EMP-',YEAR(NOW()),'-', (LAST_INSERT_ID()+1));
+END $$
+DELIMITER ;
+INSERT INTO employee
+VALUES(DEFAULT, '雷昊', 0, NOW(), 1, 1, NULL, NULL);
 ```