删除列右侧的内容

Question

我有一个包含存储路径和文件名的数据的列，如下所示：

Quit_Smoking/Include_curriculum_and_learning_activities/ACTIVITY_Q_020214.pdf

Stay_SunSmart_every_day/Education_and_learning_activities/
ACTIVITY_S_Sid_Activity_Book_11213.pdf

Stay_SunSmart_every_day/Education_and_learning_activities/
ACTIVITY_S_SS_Colouring_Book_11213.pdf

我们已将文件名拆分为自己的列，需要将其从此列中删除。我遇到的问题是文件名长度并非都是特定的，所以我正常解决此问题的方式（使用len()和right()）赢了工作。如何删除列中最后/右侧的所有内容？

Answer 1

declare @S nvarchar(100) = 'Quit_Smoking/Include_curriculum_and_learning_activities/ACTIVITY_Q_020214.pdf'

select reverse(stuff(reverse(@S), 1, charindex('/', reverse(@S)), ''))

Answer 2

DECLARE @S NVARCHAR(100) = 'Quit_Smoking/Include_curriculum_and_learning_activities/ACTIVITY_Q_020214.pdf';

SELECT SUBSTRING(@S, 1, LEN(@S) - CHARINDEX('/', REVERSE(@S)));