数据库字符集的修改的地方为两部分，服务端和客户端，并且两处必须修改一致，unix和windows操作系统就字符集修改这一部分大同小异，不同之处就是客户端修改的时候略有不同，考虑到目前windows系统较多，所以下面以windows系统下的sybase数据库字符集修改为例。
目前国内字符集：cp936
修改步骤如下：
1、首先查找数据库当前字符集
C:\Users\wsb>isql -U<usrname> -P<passwd> -S<dbname>
1> sp_helpsort
2> go
Collation Name Collation ID
------------------------------ ------------
defaultml 20
thaidict 21
iso14651 22
utf8bin 24
binary 25
altnoacc 39
altdict 45
altnocsp 46
scandict 47
scannocp 48
dict 51
nocase 52
nocasep 53
noaccent 54
espdict 55
espnocs 56
espnoac 57
rusnocs 59
cyrnocs 64
elldict 65
hundict 69
hunnoac 70
hunnocs 71
turknoac 73
turknocs 74
Loadable Sort Table Name Collation ID
------------------------------ ------------
cp932bin 129
dynix 130
gb2312bn 137
cyrdict 140
turdict 155
euckscbn 161
gbpinyin 163
rusdict 165
sjisbin 179
eucjisbn 192
big5bin 194
Sort Order Description
------------------------------
Character Set = 2, cp850
Code Page 850 (Multilingual) character set.
Sort Order = 50, bin_cp850
Binary ordering, for use with Code Page 850 (cp850).
Characters, in Order
------------------------------
! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
@ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _
` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~
????????????????????????? ???????
????????????????? ? ? ? ? ????? ? ? ? ???
? ? ? ? ? ? ??? ? ? ? ? ? ? ??????? ???? ? ? ? ???
??????????????????? ???????????? ?
WARNING! Some character(s) could not be converted into client's character set.
Unconverted bytes were changed to question marks ('?').
(return status = 0)
2、由上面反映结果可以得知，目前的字符集为cp850,同时也看到cp936字符集当前库中还不存在，需要手工进行安装，安装命令为：
Charset -U<usrname> -P<passwd> -S<dbname> binary.srt cp936
3、完成cp936字符集包的安装后，查找cp936字符集在数据库中的id，一般为171，查找方法如下：
6> select name,id from syscharsets
7> go
name id
------------------------------ ---
ascii_8 0
iso_1 1
cp850 2
defaultml 20
thaidict 21
iso14651 22
utf8bin 24
binary 25
altnoacc 39
altdict 45
altnocsp 46
scandict 47
scannocp 48
bin_iso_1 50
bin_cp850 50
bin_cp936 50
dict 51
nocase 52
nocasep 53
noaccent 54
espdict 55
espnocs 56
espnoac 57
rusnocs 59
cyrnocs 64
elldict 65
hundict 69
hunnoac 70
hunnocs 71
turknoac 73
turknocs 74
cp932bin 129
dynix 130
gb2312bn 137
cyrdict 140
turdict 155
euckscbn 161
gbpinyin 163
rusdict 165
cp936 171
sjisbin 179
eucjisbn 192
big5bin 194
(43 rows affected)
4、手工设置字符集为171，方法如下：
1> sp_configure 'default character set id',171
2> go
In changing the default sort order, you have also reconfigured SQL Server's
default character set.
Parameter Name Default Memory Used Config Value
Run Value Unit Type
------------------------------ ----------- ----------- ------------
----------- -------------------- ----------
default character set id 2 0 171
2 id static
(1 row affected)
Configuration option changed. Since the option is static, Adaptive Server must
be rebooted in order for the change to take effect.
Changing the value of 'default character set id' to '171' increases the amount
of memory ASE uses by 6 K.
(return status = 0)
1>
5、客户端字符集修改：
用记事本打开%SYBASEHOME% \locales\ locales.dat中的NT下面的loca=default
6、手工重启数据库，一般第一次启动会启动失败，这很正常，再次启动数据库，数据库启动正常后，进行字符集验证。
本文地址：http://www.xszlo.com/article/2012-09-24/7454.html，转发请保留这个地址，谢谢