Question

All i need is to remove last character which is comma (,) in this case.

I tried Substring, Left, and Right functions but they need length of the string.

Here is the scenario:-

select 
(Case col1 & 1 When 1 Then 'Case 1,' Else '' End)  + 
(Case Col2 & 2 When 2 Then 'Case 2,' Else '' End)  +
(Case Col3 & 4 When 4 Then 'Case 4,' Else '' End)  
as Case
from table_01

Answer 1

Well, just don’t remove the last comma. Remove the first one instead:

• using STUFF():

  SELECT
    STUFF(
      (CASE col1 & 1 WHEN 1 THEN ',Case 1' ELSE '' END)
      + (CASE col1 & 2 WHEN 2 THEN ',Case 2' ELSE '' END)
      + (CASE col1 & 4 WHEN 4 THEN ',Case 4' ELSE '' END),
      1,
      1,
      ''
    ) AS [Case]
  FROM table_01
  

• using SUBSTRING():

  SELECT
    SUBSTRING(
      (CASE col1 & 1 WHEN 1 THEN ',Case 1' ELSE '' END)
      + (CASE col1 & 2 WHEN 2 THEN ',Case 2' ELSE '' END)
      + (CASE col1 & 4 WHEN 4 THEN ',Case 4' ELSE '' END),
      2,
      999999  /* not necessary to calculate LEN()-1, any value
                 that is definitely greater than that will do */
    ) AS [Case]
  FROM table_01