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Convert ASCII number 177 to character +/- [message #671017]

Thu, 09 August 2018 13:18

richard_oak
Messages: 8
Registered: May 2016

Junior Member

Hello,

I'm trying to use the CHR function to convert ASCII extended number 177 to +/- symbol. These are my current results:

SELECT ASCII('±') FROM DUAL; -- Result = 177
SELECT CHR(177) FROM DUAL; -- Result = error

Does anyone know how to get the symbol '±'?

Richard

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Re: Convert ASCII number 177 to character +/- [message #671018 is a reply to message #671017]

Thu, 09 August 2018 13:40

BlackSwan
Messages: 26722
Registered: January 2009
Location: SoCal

Senior Member

richard_oak wrote on Thu, 09 August 2018 11:18

Hello,

I'm trying to use the CHR function to convert ASCII extended number 177 to +/- symbol. These are my current results:

SELECT ASCII('±') FROM DUAL; -- Result = 177
SELECT CHR(177) FROM DUAL; -- Result = error

Does anyone know how to get the symbol '±'?

Richard

Pure ASCII, IMO, is values 0, 127 inclusive.
Values greater than 127 are characterset dependent.

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Re: Convert ASCII number 177 to character +/- [message #671019 is a reply to message #671017]

Thu, 09 August 2018 13:42

Michel Cadot
Messages: 67241
Registered: March 2007
Location: Nanterre, France, http://...

Senior Member
Account Moderator

Error? What error?

From your previous topic:

Michel Cadot wrote on Thu, 26 May 2016 19:13

Use SQL*Plus and copy and paste your session.
And don't forget to format as specified above.

With "above":
Michel Cadot wrote on Thu, 26 May 2016 18:56

Please read OraFAQ Forum Guide and How to use [code] tags and make your code easier to read.
Also always post your Oracle version, with 4 decimals, as solution depends on it.

SQL> SELECT ASCII('±') FROM DUAL;
ASCII('Ð')
----------
       241

1 row selected.

SQL> SELECT CHR(177) FROM DUAL;
C
-
▒

1 row selected.

SQL> SELECT CHR(241) FROM DUAL;
C
-
±

1 row selected.

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Re: Convert ASCII number 177 to character +/- [message #671020 is a reply to message #671019]

Thu, 09 August 2018 13:52

richard_oak
Messages: 8
Registered: May 2016

Junior Member

Thanks Michel,

It is not an actual error, it is the "?" symbol:
SELECT CHR(177) FROM DUAL;
C
-
?

I can see that on your side query below returns 241 number, and on my side it returns 177. Do you know why?
SELECT ASCII('±') FROM DUAL;

ASCII('±')
----------
177

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Re: Convert ASCII number 177 to character +/- [message #671021 is a reply to message #671020]

Thu, 09 August 2018 14:06

Michel Cadot
Messages: 67241
Registered: March 2007
Location: Nanterre, France, http://...

Senior Member
Account Moderator

Yes I know why but as you repeatedly refuse to post accordingly to the forum rules and what we asked I won't answer you.

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Re: Convert ASCII number 177 to character +/- [message #671022 is a reply to message #671021]

Thu, 09 August 2018 14:34

richard_oak
Messages: 8
Registered: May 2016

Junior Member

Honestly, I missed that. I've read the rules now, hope I'm following them now:

Here it is:

Database:
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production

SQL> SELECT CHR(241) FROM DUAL;

C
-
±

In SQL*Plus it works, but it does not in SQL Developer.

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Re: Convert ASCII number 177 to character +/- [message #671026 is a reply to message #671022]

Fri, 10 August 2018 03:10

gazzag
Messages: 1082
Registered: November 2010
Location: Bristol, UK

Senior Member

Use [ CODE ] tags around your code, please. Open with [ CODE ] and close with [ /CODE ] Except without the spaces.

E.g.

SQL> select sysdate from dual;

SYSDATE
---------
10-AUG-18

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Re: Convert ASCII number 177 to character +/- [message #671027 is a reply to message #671022]

Fri, 10 August 2018 03:12

gazzag
Messages: 1082
Registered: November 2010
Location: Bristol, UK

Senior Member

richard_oak wrote on Thu, 09 August 2018 20:34

In SQL*Plus it works, but it does not in SQL Developer.

Show us, don't tell us!

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Re: Convert ASCII number 177 to character +/- [message #671035 is a reply to message #671027]

Fri, 10 August 2018 10:25

richard_oak
Messages: 8
Registered: May 2016

Junior Member

Yesterday I found the fix for this, I searched for the hexadecimal value of sign ± and the UNISTR function made the trick in SQL Developer:

SELECT UNISTR('\00B1') PLUSMINUS FROM DUAL;

P
-
±

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