GROUP BY does not work with games of different characters and special characters

Hello

I have a problem when you group by a column of text, databases with different character sets.

Database A: WE8ISO8859P15
Database b: WE8MSWIN1252

On two databases, I have a similar table with a text column (desc). DB, a, it's a type of tank, on DB B is nvarchar2. Two columns must contain the same text, but the last character is a point of inverted question mark ().

The strange thing is when I try to compare the columns according to the INTERNAL JOIN, the two columns are equal, but when I try to bring together this column, it seems they have different contents.
When I do a dump (ESCR) on the columns I get the question mark reversed on DB A ASCII Code 133, and DB B I get 191.

How do I convert between different character sets, so that my GROUP BY works as well?

Thanks for your help!

select * from
(SELECT to_char(descA) AS desc1 FROM A WHERE ID=1)a
INNER JOIN
(SELECT  descB AS desc2 FROM B WHERE ID=1) b
ON a.desc1=b.desc2
WHERE a.desc1=bdesc2

--> 1 row (-->descA==descB)


SELECT desc, count(*)
(SELECT to_nchar(descA) desc FROM A WHERE ID=1
UNION ALL
SELECT  descB AS desc FROM B WHERE ID=1) 
GROUP BY desc

--> 2 rows (can't group by desc --> descA!=descB)

try to use replace fuction, that converts a string to a character set to another.
http://www.techonthenet.com/Oracle/functions/convert.php

Tags: Database

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