How to get the correct length...removing appended extra ascii characters

I have a table fs_lg_partgroups, having the columns description,subgroupname.
I have a query like this..
select description,length(description) from fs_lg_partgroups where subgroupname='FORMULA226';
Then i got the output as
formula226 and the length is 42. Even though there are 10 characters only.
I came to know that some ascii characters are appended to description values, so it is showing the length like this.
But i don't know how to remove those ASCII characters from description column for all rows to get the exact length.
Please can u help me..

If you have used char data type then use varchar2 datatype instead of char datatype for description column.
Learn about char and varchar2 datatypes here.
http://download-east.oracle.com/docs/cd/B10501_01/server.920/a96524/c13datyp.htm#7223

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How to get the correct length...removing appended extra ascii characters

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