SQL子字符串右字符索引

Question

        input 
       -----------
        '12345-123'
        '3456-67'


       output
      ----------- 
      column 1    column 2
        12345       123
         3456        67

In SQL For Column 1 :

  SELECT  Substring('12345-123',1,CHARINDEX('-','12345-123')-1)

For column 2 : unable to achieve ? can any one help me

Answer 1

Well, you can use string manipulation:

select left(input, charindex('-', input) - 1) as col1,
       stuff(input, 1, charindex('-', input), '') as col2
from t;

Here is a db<>fiddle.

Answer 2

使用reverse（）完成两列的简单方法使逻辑保持一致。

SELECT  Substring('12345-123',1,CHARINDEX('-','12345-123')-1) col1, reverse(Substring(reverse('12345-123'),1,CHARINDEX('-',reverse('12345-123'))-1)) col2