Solved

How to shorten, trim, lowercase, remove non-alphanumeric characters and update all at once

Posted on 2010-08-26
5
1,146 Views
Last Modified: 2013-12-07
Hello,

I'm a newbie at SQL and PL/SQL, so please bear with me...

I have 2 tables, both with multiple columns. In table A there is a column named NAME and in table B there is a column named SHORTNAME. Both of those columns are VARCHAR2(254 BYTE) and both tables have an ID column so I can join them up.

What I want to do is, where a.ID = b.ID, I want to take the value of a.NAME, remove any spaces (before, after and in between), change any chars to lower case, remove any characters that aren't  a to z or 1 to 0, and "trim" the length to be a maximum of 10 alpha numeric characters. And finally, take the result and update it into b.SHORTNAME. Yes, a.NAME can be multiple words and it can include numbers and possibly other characters. I only want letters and/or numbers.

Here is an example result...
a.NAME = Experts Exchange
b.SHORTNAME=expertsexc

OR:
a.NAME=Hey! You!
b.SHORTNAME=heyyou

There are about 2k rows that I need to update, so I'm assuming that this would be done in PL/SQL? I don't know, I've never written anything this complicated in PL/SQL.

I hope I was clear enough. If not, please let me know.

Thanks,
biglarrrr
0
Comment
Question by:biglarrrr
5 Comments
 
LVL 73

Accepted Solution

by:
sdstuber earned 167 total points
ID: 33535293
update yourtable set shortname = regexp_replace(lower(name),'[^a-z0-9]')
0
 
LVL 76

Assisted Solution

by:slightwv (䄆 Netminder)
slightwv (䄆 Netminder) earned 167 total points
ID: 33535386
missed: length to be a maximum of 10 alpha numeric characters

... substr(regexp_replace(lower(name),'[^a-z0-9]'),1,10)
0
 
LVL 14

Assisted Solution

by:ajexpert
ajexpert earned 166 total points
ID: 33535394
just to add that biglarrrr needs only 10 characters as short name
 
 

update yourtable set shortname = SUBSTR(regexp_replace(lower(name),'[^a-z0-9]')), 1, 10)

Open in new window

0
 
LVL 73

Expert Comment

by:sdstuber
ID: 33535425
oops, thanks for the addition
0
 

Author Comment

by:biglarrrr
ID: 33536871
Thanks everyone. Below is the PL/SQL I came up with and it worked!

Thanks,
biglarrrr
begin

for rec in ( select id,name from tablea where name IS NOT NULL )
loop

update tableb
set shortname = substr(regexp_replace(lower(rec.name),'[^a-z0-9]'),1,10)
where id = rec.id;

end loop;

end;

Open in new window

0

Featured Post

Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Working with Network Access Control Lists in Oracle 11g (part 1) Part 2: http://www.e-e.com/A_9074.html So, you upgraded to a shiny new 11g database and all of a sudden every program that used UTL_MAIL, UTL_SMTP, UTL_TCP, UTL_HTTP or any oth…
Working with Network Access Control Lists in Oracle 11g (part 2) Part 1: http://www.e-e.com/A_8429.html Previously, I introduced the basics of network ACL's including how to create, delete and modify entries to allow and deny access.  For many…
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
This video shows how to recover a database from a user managed backup

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question