Oracle 10g如何對用戶姓名，按首字母排序、查詢

首先介紹Oracle 9i新增長的一個系統自帶的排序函數 

一、按首字母排序 

在oracle9i中新增了按照拼音、部首、筆畫排序功能。設置NLS_SORT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 

oracle9i中新增了按照拼音、部首、筆畫排序功能 

用法示例: 

拼音   

SELECT * FROM TEAM ORDER BY NLSSORT(排序字段,'NLS_SORT = SCHINESE_PINYIN_M')   

筆劃   

SELECT * FROM TEAM ORDER BY NLSSORT(排序字段,'NLS_SORT = SCHINESE_STROKE_M')   

部首   

SELECT * FROM TEAM ORDER BY NLSSORT(排序字段,'NLS_SORT = SCHINESE_RADICAL_M')   

 

二、按首字母拼音查詢 

首先咱們要建立一個能夠查詢漢字首字母的函數，函數代碼以下： 

CREATE OR REPLACE FUNCTION F_TRANS_PINYIN_CAPITAL(P_NAME IN VARCHAR2) RETURN VARCHAR2 AS   

V_COMPARE VARCHAR2(100);   

V_RETURN VARCHAR2(4000);   

  

FUNCTION F_NLSSORT(P_WORD IN VARCHAR2) RETURN VARCHAR2 AS   

BEGIN   

RETURN NLSSORT(P_WORD, 'NLS_SORT=SCHINESE_PINYIN_M');   

END;   

BEGIN   

FOR I IN 1..LENGTH(P_NAME) LOOP   

V_COMPARE := F_NLSSORT(SUBSTR(P_NAME, I, 1));   

IF V_COMPARE >= F_NLSSORT(' 吖 ') AND V_COMPARE <= F_NLSSORT('驁 ') THEN   

V_RETURN := V_RETURN || 'a';   

ELSIF V_COMPARE >= F_NLSSORT('八 ') AND V_COMPARE <= F_NLSSORT('簿 ') THEN   

V_RETURN := V_RETURN || 'b';   

ELSIF V_COMPARE >= F_NLSSORT('嚓 ') AND V_COMPARE <= F_NLSSORT('錯 ') THEN   

V_RETURN := V_RETURN || 'c';   

ELSIF V_COMPARE >= F_NLSSORT('咑 ') AND V_COMPARE <= F_NLSSORT('鵽 ') THEN   

V_RETURN := V_RETURN || 'd';   

ELSIF V_COMPARE >= F_NLSSORT('妸 ') AND V_COMPARE <= F_NLSSORT('樲 ') THEN   

V_RETURN := V_RETURN || 'e';   

ELSIF V_COMPARE >= F_NLSSORT('發 ') AND V_COMPARE <= F_NLSSORT('猤 ') THEN   

V_RETURN := V_RETURN || 'f';   

ELSIF V_COMPARE >= F_NLSSORT('旮 ') AND V_COMPARE <= F_NLSSORT('腂 ') THEN   

V_RETURN := V_RETURN || 'g';   

ELSIF V_COMPARE >= F_NLSSORT('妎 ') AND V_COMPARE <= F_NLSSORT('夻 ') THEN   

V_RETURN := V_RETURN || 'h';   

ELSIF V_COMPARE >= F_NLSSORT('丌 ') AND V_COMPARE <= F_NLSSORT('攈 ') THEN   

V_RETURN := V_RETURN || 'j';   

ELSIF V_COMPARE >= F_NLSSORT('咔 ') AND V_COMPARE <= F_NLSSORT('穒 ') THEN   

V_RETURN := V_RETURN || 'k';   

ELSIF V_COMPARE >= F_NLSSORT('垃 ') AND V_COMPARE <= F_NLSSORT('擽 ') THEN   

V_RETURN := V_RETURN || 'l';   

ELSIF V_COMPARE >= F_NLSSORT('嘸 ') AND V_COMPARE <= F_NLSSORT('椧 ') THEN   

V_RETURN := V_RETURN || 'm';   

ELSIF V_COMPARE >= F_NLSSORT('拏 ') AND V_COMPARE <= F_NLSSORT('瘧 ') THEN   

V_RETURN := V_RETURN || 'n';   

ELSIF V_COMPARE >= F_NLSSORT('筽 ') AND V_COMPARE <= F_NLSSORT('漚 ') THEN   

V_RETURN := V_RETURN || 'o';   

ELSIF V_COMPARE >= F_NLSSORT('妑 ') AND V_COMPARE <= F_NLSSORT('曝 ') THEN   

V_RETURN := V_RETURN || 'p';   

ELSIF V_COMPARE >= F_NLSSORT('七 ') AND V_COMPARE <= F_NLSSORT('裠 ') THEN   

V_RETURN := V_RETURN || 'q';   

ELSIF V_COMPARE >= F_NLSSORT('亽 ') AND V_COMPARE <= F_NLSSORT('鶸 ') THEN   

V_RETURN := V_RETURN || 'r';   

ELSIF V_COMPARE >= F_NLSSORT('仨 ') AND V_COMPARE <= F_NLSSORT('蜶 ') THEN   

V_RETURN := V_RETURN || 's';   

ELSIF V_COMPARE >= F_NLSSORT('侤 ') AND V_COMPARE <= F_NLSSORT('籜 ') THEN   

V_RETURN := V_RETURN || 't';   

ELSIF V_COMPARE >= F_NLSSORT('屲 ') AND V_COMPARE <= F_NLSSORT('鶩 ') THEN   

V_RETURN := V_RETURN || 'w';   

ELSIF V_COMPARE >= F_NLSSORT('夕 ') AND V_COMPARE <= F_NLSSORT('鑂 ') THEN   

V_RETURN := V_RETURN || 'x';   

ELSIF V_COMPARE >= F_NLSSORT('丫 ') AND V_COMPARE <= F_NLSSORT('韻 ') THEN   

V_RETURN := V_RETURN || 'y';   

ELSIF V_COMPARE >= F_NLSSORT('帀 ') AND V_COMPARE <= F_NLSSORT('咗 ') THEN   

V_RETURN := V_RETURN || 'z';   

END IF;   

END LOOP;   

RETURN V_RETURN;   

END;   

 

 

隨後，咱們能夠先取出姓名，而後截取第一個漢字，最後取漢字的首字母，便可用來做爲查詢條件 

select e.fullname,e.expert_id from expert e where f_trans_pinyin_capital(substr(e.fullname,1,1)) = 'z'  

 

 

 

最後展現一個將兩個結合起來運用的例子： 

select e.expert_id,e.eperson_id,e.fullname,  

sum(b2i.browse_num) browsecount,  

count(o.object_id),wmsys.wm_concat(distinct d.name)  

from expert e  

left join expert2disciplinetype e2d on e2d.expert_id = e.expert_id  

left join disciplinetype d on d.discipline_type_id = e2d.discipline_type_id  

and d.upid = '0'  

left join community2expert c2e on c2e.expert_id = e.expert_id  

left join item i on i.item_type_id = 'AcademicRes' and i.withdrawn = 'N'  

join metadatavalue m on m.item_id = i.item_id and m.metadata_field_id = '64'  

join objectpublishinfo o on o.object_id = i.item_id  

and o.object_type = 'item' and o.viewobjecttype = 'eperson'  

and o.viewobjectid = e.eperson_id and o.state = '1'  

and o.publishstate_id = '3'  

left join browse2item b2i on b2i.item_id = o.object_id  

where e.state = '1' and f_trans_pinyin_capital(substr(e.fullname,1,1)) = 'z'  

group by e.expert_id,e.eperson_id,e.fullname  

order by nlssort(e.fullname,'NLS_SORT=SCHINESE_PINYIN_M')  

 

轉自：http://zheng12tian.iteye.com/blog/817571