Oracle9i之前,中文是按照二進制編碼進行排序的。在oracle9i中新增了按照拼音、部首、筆畫排序功能。
1、設置NLS_SORT參數值
SCHINESE_RADICAL_M 按照部首(第一順序)、筆劃(第二順序)排序
SCHINESE_STROKE_M 按照筆劃(第一順序)、部首(第二順序)排序
SCHINESE_PINYIN_M 按照拼音排序
BINARY_CI 忽略大小寫的排序
2、Session級別的設置,修改ORACLE字段的默認排序方式:
按拼音:alter session set nls_sort = SCHINESE_PINYIN_M;
按筆畫:alter session set nls_sort = SCHINESE_STROKE_M;
按偏旁:alter session set nls_sort = SCHINESE_RADICAL_M;
忽略大小寫:alter session set nls_sort = BINARY_CI;
3、語句級別設置排序方式:
按照筆劃排序
select * from dept order by nlssort(name,'NLS_SORT=SCHINESE_STROKE_M');
按照部首排序
select * from dept order by nlssort(name,'NLS_SORT=SCHINESE_RADICAL_M');
按照拼音排序,此爲系統的默認排序方式
select * from dept order by nlssort(name,'NLS_SORT=SCHINESE_PINYIN_M');
忽略大小寫
select * from dept order by nlssort(name,'NLS_SORT=BINARY_CI');
4、修改系統參數(數據庫所在操作系統):
set NLS_SORT=SCHINESE_RADICAL_M ;export NLS_SORT (sh)
setenv NLS_SORT SCHINESE_RADICAL_M (csh)
HKLC\SOFTWARE\ORACLE\home0\NLS_SORT (win註冊表)
5、設置查詢時忽略大小寫方法:
alter session set nls_sort='BINARY_CI';
alter session set nls_comp='LINGUISTIC';