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Asked: 2026-05-13T01:23:27+00:00

Question: I have a table with the columns ID, Name, Prename, Mail Mail contains

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Question:
I have a table with the columns ID, Name, Prename, Mail

Mail contains the e-mail address of a person, for example john.doe@example.com

Now I need to check whether Name=” or Prename=”
and extract “John” from Mail and put it into Prename, and put “Doe” into column Name

Can i do that with SQL, if yes how ?

I use MS-SQL 2005

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1 Answer

  1. Editorial Team

    You can use an UPDATE statement as follows. 

    --relies on one and only one dot in the email account!
UPDATE  Customer
SET  PreName = LEFT(Email, CHARINDEX('.',Email)-1) --FirstName
     ,Name = SUBSTRING(Email,CHARINDEX('.',Email)+1, CHARINDEX('@',Email)-CHARINDEX('.',Email)-1)

    To test this solution, try with a single string as a test.

    --test it out with this script!
DECLARE @Addr varchar(100)

SELECT @Addr = 'humpty.dumpty@here.com'

DECLARE @DotAt int, @At int

SELECT @DotAT = CHARINDEX('.',@Addr)
       ,@At = CHARINDEX('@',@Addr)

SELECT  LEFT(@Addr, @DotAt-1), SUBSTRING(@Addr,@DotAt+1,@At-@DotAt-1)
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