该记录的主键值是一个重复值，它在表中已经存在。 有效性规则失败. 一个值违背了通过使用“有效性规则”属性为该字段或该表设置的规则。 必填字段中的空值. 由于本字段的“必填”属性被设置为“是”，因此字段值不允许为 null。 “自动编号”字段中的空值

若要了解详细信息，请参阅自定义频道通知。. 可通过多种方式在 Teams 中配置聊天和频道通知。 管理会议通知. 在“通知和活动”的“会议”部分中，可以配置会议即将开始的通知的显示方式，以及会议期间的聊天通知。. 可以使用切换开关打开或关闭会议开始通知。

若要打开文件资源管理器，请 + E 选择 Windows 徽标键 ，或转到“开始 ” 并在搜索框中键 入文件资源管理器。 在结果中选择“文件资源管理器”。 热门主题. 以下是关于文件资源管理器的一些常见问题的答案。

Description. The ROUND function rounds a number to a specified number of digits. For example, if cell A1 contains 23.7825, and you want to round that value to two decimal places, you can use the following formula:

Saving to Microsoft account is currently available in US, AU, GB, CA, DK, FR, JP, MX, KR, BR, and will be available to more regions in the future.

Press and hold (or right-click) the MP4 file you want to play, select Open with, and then choose your preferred file player from the list of applications.

Select the View tab and, in Advanced settings, select Show hidden files, folders, and drives and OK.

Here's what it takes to upgrade to Windows 10 on your PC or tablet: Latest OS: Make sure you're running the latest version—either Windows 7 SP1 or Windows 8.1 Update. Find out which version you're running.

The exception to this is if you turn off the setting that disables all non-essential connected experiences. The service that roams your privacy settings across devices is also turned off by that switch, so when that setting is off your settings will not roam to, or from, that particular device.

Last updated: February 2024. For previous versions, please see the archives here. Our Approach to Search. We recognize that in our technology-driven world, search engines are in many ways the gateway to the internet and the primary way people find the content they are looking for amongst the trillions of ever-changing webpages available online.