application for registration of return even when not satisfying the where condition

Hello

Under query returns value 1 D ' although it falls not on the Cook ' 01 "and 99".
I want to really get the last 2 characters of the string and filter out if this isn't a number. Please help me.

Select * from)
Select substr('qwe1D',4) double val)
where val between '01' and '99';


Thank you
Madhuri

Madhuri says:
Hello

Under query returns value 1 D ' although it falls not on the Cook ' 01 "and 99".
I want to really get the last 2 characters of the string and filter out if this isn't a number. Please help me.

Select * from)
Select substr('qwe1D',4) double val)
where val between '01' and '99';

Thank you
Madhuri

But 1 D "is between" 01"and 99". Simply because 1 'is between '0' and 9'.
Another example: 1111111 "is also between ' 01" and 99 ". This is how works a comparison of strings .

To filter strings that have no numeric characters in them, you can use several functions. regexp_substr, regexp_replace, translation, regexp_like etc.

This might work:

select * from (
select substr('qwe1D',4) val from dual )
where regexp_like(val,'\d{2}$');

Published by: W. Sven September 27, 2012 12:35

Tags: Database

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