如何使用最后一个字母数字键作为参考修剪数据

Question

Need your help on below Data trimming or what so ever to get the result that shows also on below. I want to get the data where my reference is the last - symbol.

See example below.

   FROM                  TO
  +-------------------------------+
  |ABC-1234-AR-R  | ABC-1234-AR   |
  |ABC-1254-AR-IT | ABC-1254-AR   |
  |ABC-1223-AR-LTL| ABC-1223-AR   |
  |ABC-1234-R     | ABC-1234      |
  +-------------------------------+

Answer 1

This will give you index of last occurence of a hyphen:

LEN(data) - CHARINDEX('-', REVERSE(data)) + 1

So it's enough to take substring of this length:

SELECT
    data,
    SUBSTRING(data, 1, LEN(data) - CHARINDEX('-', REVERSE(data))) AS data_trimmed
FROM yourTable;

Demo

Answer 2

You can also use a combination of LEFT and CHARINDEX functions.

Query

select [from], 
left([from], len([from]) - charindex('-', reverse([from]), 1)) as [to]
from [your_table_name];

Find a demo here