大约有 42,000 项符合查询结果（耗时：0.0233秒） [XML]
如何快速导入拓展？拓展市场可一键导入 - App Inventor 2 中文网 - 清泛IT...
常用的拓展都可以一键导入，可以搜索你想要的拓展。如果没有找到，可以反馈给我们，会持续更新的。
AppInventor如何实现通过扫二维码导入表格数据 - App Inventor 2 拓展 - 清...
1、扫二维码：
使用原生的“条码扫描器”组件：
2、读取二维码中的url信息：
从上面条码组件的事件中获取。
3、访问远程url获取表格csv数据：
使用Web客户端组件访问url获取数据。数据格式建议采用csv（逗号分隔）格...
如何导入授权证书？ - App Inventor 2 离线版 - 清泛IT社区，为创新赋能！
步骤如下，导入证书后账户会自动填充好
如何查看 mac 地址？ - App Inventor 2 离线版 - 清泛IT社区，为创新赋能！
授权页面右下角有 mac 地址信息，点击复制图标即可复制到剪贴板，必要时提供给客服进行授权
Create boolean column in MySQL with false as default value?
I want to create a table in MySQL with a boolean column whose default value is false . But it's accepting NULL as default...
...
How do I add indices to MySQL tables?
I've got a very large MySQL table with about 150,000 rows of data. Currently, when I try and run
7 Answers
...
What do column flags mean in MySQL Workbench?
In MySQL Workbench table editor there are 7 column flags available: PK, NN, UQ, BIN, UN, ZF, AI.
3 Answers
...
“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
... but the values you insert don't map to a partition.
If you use REPLACE, MySQL actually does a DELETE followed by an INSERT internally, which has some unexpected side effects:
A new auto-increment ID is allocated.
Dependent rows with foreign keys may be deleted (if you use cascading foreign ke...
Installing specific package versions with pip
I'm trying to install version 1.2.2 of the MySQL_python adaptor, using a fresh virtualenv created with the --no-site-packages option. The current version shown in PyPi is 1.2.3 . Is there a way to install the older version? I found an article stating that this should do it:
...
MySql: Tinyint (2) vs tinyint(1) - what is the difference?
I knew boolean in mysql as tinyint (1) .
4 Answers
4
...