Prevent Character in a praticular column

I am creating a grade book. I have a grades column that is set to Text. I have what is needed to change the text to number . The problem is I only want the following letter to be allowed in the field. That is NA or ABS I do not want no other text to be able
to be saved in the field i.e !@@#>.<, etc. How do I do this and should I use a trigger to make it happen.
Thanks in advance

You are thinking backwards. You should not seek to PREVENT values from being entered. You should seek to ALLOW specific values. You do this using a constraint. In addition, you asked this same question with a slightly different context
a long time ago - you might want to review the responses since they are likely to be similar and useful
disallow letters in varchar

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How do i prevent display of a particular column in ALV

How do i prevent display of a particular column
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Hi Serdar,
Please do let us know the link , as soon as your code sample is put in sdn.sap.com.
I request the veteran members of this forum to contribute to WebLogs or code samples, since over the time, the same questions will be asked and instead of repeating the answers, we can direct them to Weblogs or Code Samples.
There is an ABAP FAQ present in this site, which has given insight to so many things, that I have not even considered remotely possible.
As seen today, there was a useful piece of code posted. Instead of posting the code in the forum, you can create it as a weblog and post it there.
Regards,
Subramanian V.

Replace a single character in a textual column in sql server

Hello,
could you confirm to me that:
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SET LastName = REPLACE(LTRIM(RTRIM(LastName)), 'A', 'B')
replaces every occurrence of character A with character B, in selected column, regardless
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select REPLACE(LTRIM(RTRIM(lastname)), 'A', 'B') from tablename
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You can also execute the select statement for cross verfication
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Hello,
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hope this helps
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In the internal which you are using to display the data replace the MATNR just by the fifth character of the MATNR.
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Note - Please mark all the helpful answers

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Hello
This is a very strange issue i am facing when i use SQL+ on different clients.
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A
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Cheers Mate , You are a Star ,
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5 raise_application_error
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No need to disable anything:
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2 (pk, col)
3 select pk + 100
4 ,col
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2 from t;
 PK CO
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Is there a way to prevent toplink from generating the column when its null?

Hi jsutherl,
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Exception [TOPLINK-46] (Oracle TopLink Essentials - 2.0.1 (Build b04-fcs (04/11/2008))): oracle.toplink.essentials.exceptions.DescriptorException
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I'm guessing this is because ID is a primary key and its forcing me to have a non-read-only mapping.
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Any thoughts?

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Best Regards,
Salim

What is the business requirement you're trying to satisfy?
If your database character set is based on ASCII, CHR(1) (the Start of Header) character is likely to be transferred between systems without character set conversion. Non-ASCII character sets (i.e. Big5 for Chinese data) don't necessarily share the same control characters, though, and generally won't have the same binary representation of an ASCII control character (so CHR(1) in a non-ASCII based database wouldn't necessarily return the same character that CHR(1) would in an ASCII based database).
Justin

How to select each character of column value

Hi All,
How can i get each character separately of a column value in a select statement.
LIKE i emp table if ename='Test' then i want
a select statement that can give me the result like this
T,e,s,t
Regards,
Anil R

or this?
SQL> create table mytable
2 as
3 select 'test' text from dual union all
4 select 'a text, containing two comma''s (,)' from dual union all
5 select 'a text ending with a comma,' from dual
6 /
Tabel is aangemaakt.
SQL> select text
2       , substr(regexp_replace(text,'(*?)',',\1'),2,length(text)*2-1) with_commas
3    from mytable
4 /
TEXT                               WITH_COMMAS
test                               t,e,s,t
a text, containing two comma's (,) a, ,t,e,x,t,,, ,c,o,n,t,a,i,n,i,n,g, ,t,w,o, ,c,o,m,m,a,',s, ,(,,,)
a text ending with a comma,        a, ,t,e,x,t, ,e,n,d,i,n,g, ,w,i,t,h, ,a, ,c,o,m,m,a,,
3 rijen zijn geselecteerd.Regards,
Rob.
Message was edited by:
Rob van Wijk
Slight modification to cater for strings beginning and ending with commas.

Prevent Character in a praticular column

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