Question

How to compare number and varchar?

Asked by: JelaV

Hi - I have  table 'a' with a NUMBER column (col1) that is of course always digits.  The other table 'b' has the same column (col1) that is VARCHAR2 of 10 chars.  
The b.col1 could be: '',  '  ', 'abc', '1234', '02345'...
The a.col1 could be:  1234, 0123, 02345.....

I need to select from these two tables where a.col1 = b.col1:
 select * from a, b where a.col1= b.col1

1. If I use to_char(a.col1) it would give me 2345 instead of 02345.
    So select * from a, b where to_char(a.col1)= trim(b.col1) would not return what I   want

2. select * from a, b where a.col1= trim(b.col1) would return the error invalid number as
    'abs' is not a number.

So I do need to get  only numbers from the columns b.col1.
Any solution?

 

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2009-05-02 at 23:41:37ID24375767
Tags

plsq

,

oracle

,

sql

,

Oracle HCM

Topic

Enterprise Software

Participating Experts
1
Points
500
Comments
4

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

  1. Using CHAR vs VARCHAR2 datatype
    i have been using CHAR datatype for columns that contain a small domain, for example: {'NEW','OPENED','ACCEPTED','INPROG','COMPETED','APPROVED'} some database designers will opt for VARCHAR2 in this circumstance. i think CHAR is better because it is not really a waste of s...
  2. VARCHAR2 vs VARCHAR
    I've been told VARCHAR is being phased out, and fields should be VARCHAR2. In passing this recommendation along in design standards, I need more information on the reasons for changing from VARCHAR to VARCHAR2.
  3. Differential between CHAR, VARCHAR and VARCHAR2.
    Hi, Can someone tell me what are different between varchar2, varchar and char datatypes. If my database is Chinese version and store the data in Unicode 8 format. Is varchar2 more suitable for me to keep data? Can still I using the datatype that I specified in my Engli...
  4. Testing VARCHAR2 for Numeric
    Is there a function or way of testing a VARCHAR2 field to see if it contains numeric data (something similar to the IsNum() function in VB. I do not want to use a conversion function, like to_num(), becuase I want to keep the value as a VARCHAR2 and I don't want it to generat...
  5. varchar2
    what is the history of varchar2.I mean why it is varchar2 rather varchar.
  6. CHAR Vs VARCHAR2
    Are there any good reasons to use a char Vs varchar2 datatype in an index? I know that there's added overhead when using varchar2, but what specifically is the benefit of using char over varchar2?

Free Tech Articles

  1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
    It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
  2. SCCM OSD Basic troubleshooting
    SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
  3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
    This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
  4. Create a Win7 Gadget
    This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
  5. Outlook continually prompting for username and password
    There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
  6. Backup Exchange 2010 Information Store using Windows Backup
    There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

Cloud Class Webinars

  1. Avoiding Bugs in Microsoft Access
    Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
  2. Top 10 Best New Features in Visio 2010
    Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
  3. IT Consultant Business Secrets Revealed
    Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
  4. Disaster Recovery and Business Continuity
    Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
  5. Organize Your Visio Diagrams with Containers and Lists
    Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
  6. How to Us Objects, Properties, Events and Methods in Microsoft Access
    Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Join the Community

Answers

 

by: angelIIIPosted on 2009-05-02 at 23:53:45ID: 24288921

what about:

 select * from a, b where TRIM(LEADING '0' FROM a.col1) = TO_CHAR(b.col1)

                                              
1:

Select allOpen in new window

 

by: JelaVPosted on 2009-05-04 at 00:05:16ID: 24292982

So the question is: How to get numeric values from an alphanumeric column?

 

by: angelIIIPosted on 2009-05-04 at 00:40:55ID: 24293098

I use this function:_

create or replace FUNCTION GetNumber2(txt_IN IN varchar2)
RETURN NUMBER
IS
	test NUMBER;
	res VARCHAR2(128);
BEGIN
 
BEGIN
  res := TRANSLATE ( txt_IN, '0123456789' , '          ');
  res := REPLACE( TRANSLATE ( txt_IN, res ,  ' ' ) , ' ', '');
 
  test := TO_NUMBER(res);
 
EXCEPTION
  WHEN VALUE_ERROR THEN test:=NULL;
END;
 
RETURN (test);
 
END GetNumber2;
                                              
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:

Select allOpen in new window

20120131-EE-VQP-002

3 Ways to Join

30-Day Free Trial

The Experts

98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

The Experts

97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

Testimonials

"...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

Testimonials

"I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

Testimonials

"WOW! You guys have great, active, and knowledgeable people on here." moore50

Business Clients

Business Clients

In the Press

"If you’ve got a question... Experts Exchange can supply an answer.”

In the Press

"...an invaluable aid for both IT professionals and those who require tech support."

In the Press

"where IT professionals provide quick answers on just about any topic"

Business Account Plans

Loading Advertisement...