Celebrate National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

Solved

checking for non-numeric and numeric values in substr

Posted on 2012-12-26

Oracle Database

2 solutions

Medium Priority

616 Views

Last Modified: 2012-12-26

Hi All,

I need your assistance. I have a simple select statement below but I am struggling with non-numeric and numeric values. I would like to check if characters 2 to 7 of 'VHT56789TYHBG' are numeric and if characters 2 to 7 of 'VHT56789TYHBG' are non-numeric and to remove 1st and last 2 characters of 'VHT56789TYHBG'.

Thanks in advance.

select
CASE
WHEN substr('VHT56789TYHBG',2,7) –how to check for numeric
THEN substr('VHT56789TYHBG',,8,2)
WHEN substr('VHT56789TYHBG',,2,7) –how to check for non-numeric
THEN substr('VHT56789TYHBG',)—then remove 1st and last 2 characters
ELSE
'VHT56789TYHBG',
END
from dual

Comment

Question by:jose11au

[X]

Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

Help others & share knowledge
Earn cash & points
Learn & ask questions

Join The Community

3 Comments

LVL 23

Accepted Solution

by:OP_Zaharin

OP_Zaharin earned 1200 total points

ID: 387225272012-12-26

- the example is using LENGTH(), TRIM() and TRANSLATE() function that returns NULL if the given string is NUMERIC and value greater than 0 if it contain non-numeric. I changed the string to V1256789TYHBG to test for numeric and VHT56789TYHBG for non numeric:

select
CASE WHEN LENGTH(TRIM(TRANSLATE(SUBSTR('V1256789TYHBG',2,7), ' +-.0123456789',' '))) is NULL--–check for numeric if true.
THEN substr('V1256789TYHBG',2,7)
ELSE -- if not numeric
'V1256789TYHBG'
END results
from dual

LVL 14

Assisted Solution

by:ajexpert

ajexpert earned 800 total points

ID: 387225972012-12-26

Other way is to write custom function (and you can call via SELECT statement) too

CREATE OR REPLACE FUNCTION chk_numeric (p_in_str IN VARCHAR2)
   RETURN VARCHAR2
AS
   v_ret_val   VARCHAR2 (100);

    p_new_str := SUBSTR (p_in_str, 2, 7);

   FUNCTION is_number (p_str IN VARCHAR2)
      RETURN VARCHAR2
   IS
      l_num       NUMBER;
      p_new_str   VARCHAR2 (4000);
   BEGIN
      


      l_num := TO_NUMBER (p_new_str);
      RETURN 'Y';
   EXCEPTION
      WHEN OTHERS
      THEN
         RETURN 'N';
   END is_number;
BEGIN

   v_chk_str    := is_number(p_new_str);
   
   IF v_chk_str = 'N' THEN
        -- other logic...
        
        NULL;                
   END IF;
END chk_numeric;

Open in new window

Author Comment

by:jose11au

ID: 387226412012-12-26

Thank so much guys.

Featured Post

Question has a verified solution.

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

How to use Network Access Control Lists in Oracle

Article by: sdstuber

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…

Oracle Database

Downloading Oracle Log Files in AWS RDS

Article by: Doug

Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface. I made a script to download the Alert Log, look for errors, and email me the trace files. In this article I'll describe what I did and share my script.