Help with updating records in a column.

Question

Help with updating records in a column.

anushakadiyala 52521

SSC Enthusiast

Points: 118
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December 17, 2013 at 12:33 pm

#283607

Hello,
I am completely new to T-SQL and I am learning how to do some complex stuff.
I have a table called TA with columns ServerName, TextA
Table Name : TA
columns 1: Server name
column 2: TextA
in the column "ServerName" I have listed server names like
Serv1 Prod
Serv2 prod
Server3.disc.dim.com prod
server4.dim.com Prod
server5.st.dim.com prod
I need to update the column Servername such a way that I need to remove anything with ".disc.dim.com",".dim.com","st.dim.com"
I tried using replace function but that doesn't seem to help.
Any guidance is much appreciated.
Regards,
Anush.

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Gail Shaw SSC Guru Points: 1004504 More actions · Answer 1

What was the code that you tried?

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

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anushakadiyala 52521 SSC Enthusiast Points: 118 More actions · Answer 2

Thank you for taking a look, This is the code I have been trying.

UPDATE TA

SET ServerName= REPLACE(ServerName, '%.%.dim.com', '')

WHERE Servername like '%.%.dim.com%'

basically I want to remove anything that starts with first "."

Sean Lange SSC Guru Points: 286573 More actions · Answer 3

anushakadiyala 52521 (12/17/2013)
Thank you for taking a look, This is the code I have been trying.
UPDATE TA
SET ServerName= REPLACE(ServerName, '%.%.dim.com', '')
WHERE Servername like '%.%.dim.com%'
basically I want to remove anything that starts with first "."

I think what you are trying to do is to change the ServerName to be dim.com? They way you have this coded it won't actually do anything.

Is this closer to what you want?

UPDATE TA

SET ServerName= 'dim.com'

WHERE Servername like '%.%.dim.com%'

This still probably isn't quite what you are looking for but it is not at all clear what you are trying to do.

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Jeff Moden SSC Guru Points: 1003853 More actions · Answer 4

anushakadiyala 52521 (12/17/2013)
Thank you for taking a look, This is the code I have been trying.
UPDATE TA
SET ServerName= REPLACE(ServerName, '%.%.dim.com', '')
WHERE Servername like '%.%.dim.com%'

You cannot use wildcards in a REPLACE.

basically I want to remove anything that starts with first "."

The following should do as you ask... I don't know how you operate but I recommend not just blindly using this. Lookup the functions in Books Online (press the {f1} key in SSMS to get there) and teach yourself how they work and why. 😉

UPDATE dbo.TA

SET ServerName = SUBSTRING(ServerName,1,CHARINDEX('.',ServerName)-1)

WHERE ServerName LIKE '%.%'

;

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

Helpful Links:
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Luis Cazares SSC Guru Points: 183698 More actions · Answer 5

As far as I understand, it should be more like this to keep the "prod" at the end of the name.

UPDATE TA

SET ServerName = STUFF(ServerName, CHARINDEX('.', Servername), CHARINDEX(' ', Servername) - CHARINDEX('.', Servername), '')

WHERE ServerName LIKE '%.%'

Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?

How to post data/code on a forum to get the best help: Option 1 / Option 2

Jeff Moden SSC Guru Points: 1003853 More actions · Answer 6

Luis Cazares (12/17/2013)
As far as I understand, it should be more like this to keep the "prod" at the end of the name.
UPDATE TA
SET ServerName = STUFF(ServerName, CHARINDEX('.', Servername), CHARINDEX(' ', Servername) - CHARINDEX('.', Servername), '')
WHERE ServerName LIKE '%.%'

Hmmm... I wasn't even looking at the code examples. I was going only by...

basically I want to remove anything that starts with first "."

The code examples do tell a different story, though. Thanks for the catch.

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)