Remove special characters

Member_2_7967487
Member_2_7967487 used Ask the Experts™
on
Greetings!

I would like some assistance to remove the | sign ONLY, if the Category IDs start with |

Example: Per highlighted screenshot, I would like to remove the | in the front of the column. I would like to leave the | for the rest to help separate the numbers. Thanks!

 remove pipeline
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Ryan ChongSoftware Team Lead

Commented:
try like:
select *, 
case when charindex('|',CategoryIDs)=1 then substring(CategoryIDs,charindex('|',CategoryIDs)+1,len(CategoryIDs)-1) else CategoryIDs end New_CategoryIDs from Items

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or
select *, 
case when charindex('|',CategoryIDs)=1 then substring(CategoryIDs,2,len(CategoryIDs)-1) else CategoryIDs end New_CategoryIDs from Items

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Qlemo"Batchelor", Developer and EE Topic Advisor
Top Expert 2015

Commented:
I think using left is more effective:
select *, case when left(CategoryIDs,1) <> '|' then CategoryIDs else substring(CategoryIDs,2,8000) end CategoryIDs2 from Items

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Vitor MontalvãoIT Engineer
Distinguished Expert 2017

Commented:
Please test this in a DEV environment before running in Production:
UPDATE Items
SET CategoryIDs = SUBSTRING (CategoryIDs ,2, LEN(CategoryIDs)-1)  
WHERE LEFT(CategoryIDs,1) = '|'

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Senior DBA
Most Valuable Expert 2018
Top Expert 2014
Commented:
You should use LIKE, because it is "sargable", rather using any function on the column, which is not sargable.  Thus, indexes could be far more efficiently used with LIKE.

I've also found STUFF to be more efficient than SUBSTRING to remove a char(s).

Therefore, my code would be:

UPDATE ...
SET CategoryIDs = STUFF(CategoryIDs, 1, 1, '')
WHERE CategoryIDs LIKE '|%'

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