安装完SQL Server应用程序后，用户需首先创建数据库。数据库是按特定方式组织、可供多个用户共享、冗余度较低的数据集合。在SQL Server中，可利用Substring函数提取字符串的指定部分。该函数 ...

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As of today, July 14, 2026, SQL Server 2016 has reached end of support. For the past decade, SQL Server 2016 has helped organizations run mission-critical applications and support the data needs of ...

Microsoft’s 2026 lifecycle schedule includes major support deadlines for Windows, Office, SQL Server, SharePoint, and Azure services. Microsoft will end support or servicing for dozens of Windows, ...

简介： 数据库里一堆长字符串，只想取中间的身份证号、手机号或日期怎么办？ 别再手动导 Excel 了，一个 SUBSTRING() 函数全搞定！ 本集重点： 三个参数：str（目标）、pos（从哪开始）、len ...

Self-hosting your data and services with Network Attached Storage (NAS) is a great way to free yourself from the spiraling costs and tangled web of subscription fees. Whether you’re simply looking to ...

SUBSTRING(str, start [, length]) str：表示要进行提取操作的原始字符串。 start：指定开始提取的位置。位置从 1 开始计数，如果 start 为正数，则从字符串的开头开始计数；如果 start 为负数，则从 ...

In this article we’ll cover the essential SQL Server data types and discuss their common usage. Data is at the core of all relational database systems and SQL Server supports many different types of ...

Ayush Pande is a PC hardware and gaming writer. When he's not working on a new article, you can find him with his head stuck inside a PC or tinkering with a server operating system. Besides computing, ...

Ayush Pande is a PC hardware and gaming writer. When he's not working on a new article, you can find him with his head stuck inside a PC or tinkering with a server operating system. Besides computing, ...