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SQL Server中Substring用法
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。该函数通过指定起始位置和长度,返回原字符串中的子串,常用于数据查询与 ...
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