Remove last character from column conditionally

Hi,

I would like to be able to update a table variable in that if the third character is a 9 then I need to remove the last character.

This is what I am using currently:
UPDATE @Table
      SET Tag = (SELECT LEFT(Tag, LEN(Tag) - 1) WHERE SUBSTRING(Tag,3,1) = 9)

This has the correct effect on the rows where the character is 9, but the other rows where the third character is not 9 are updated to NULL.

Any help would be appreciated.
Thanks
Morpheus7Asked:
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Kyle AbrahamsSenior .Net DeveloperCommented:
UPDATE @Table
      SET Tag = case when  SUBSTRING(Tag,3,1) = 9 then LEFT(Tag, LEN(Tag) - 1)  else Tag end
0

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Scott PletcherSenior DBACommented:
UPDATE @Table
       SET Tag = LEFT(Tag, LEN(Tag) - 1)
WHERE SUBSTRING(Tag,3,1) = '9'
0
Morpheus7Author Commented:
Many thanks, that's great.
0
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