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事务的使用-django、 SQL工具
2022-07-17 05:03:00 【du fei】
使用时需要安装第三方模块
pip install django-haystack whoosh jieba -i https://pypi.python.org/simple/ # 加锁
from django.db import transaction
# 开启事务
with transaction.atomic():
# 添加回滚
point = transaction.savepoint()
try:
User.objects.filter(name='zhangsan').update(name='wangwu')
except Exception as e:
print(e)
# 当修改失败后回滚
transaction.savepoint_rollback(point)
# 成功后提交
transaction.savepoint_commit(point)sql中的命令行
select @@global.transaction_isolation; 查看全局
select @@transaction_isolation; 查看当前
set session transaction isolation level serializable; 可串行化
开启事务
mysql> start transaction;
结束
commit链接: https://pan.baidu.com/s/1WW8TF1PnOBZPHAK8N_uJMw?pwd=tvu5
提取码: tvu5
复制这段内容后打开百度网盘,操作更方便哦
姓名(Name):cr173
序列号(Code):8d8120df-a5c3-4989-8f47-5afc79c56e7c修改密码
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';
# 6.SQLyog过期,如何破解
我使用的是SQLyog 9.63,只有一个月的试用期,如何超过了试用期,怎么办?
在这时我可以告诉大家一个解决方案,那就是通过删除注册表项,再获得一个月的试用期。具体的操作方法如下:
第一步,运行窗口中输入regedit,回车进入注册表编辑器。
第二步,按路径HKEY_CURRENT_USER->SoftWare找到红色标注的{8E919370-*}项。
## 第三步,右键该项,选择删除,再点击是即可。
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