oracle数据库字符串切割split

1 新建数据库类型

create or replace type STR_SPLIT as table of varchar2(50);

2 创建function

CREATE OR REPLACE FUNCTION SPLITSTR(P_STRING
 IN VARCHAR2, 
 P_DELIMITER IN VARCHAR2) 
 RETURN STR_SPLIT 
 PIPELINED IS 
 V_LENGTH NUMBER := LENGTH(P_STRING); 
 V_START NUMBER := 1; 
 V_INDEX NUMBER; 
BEGIN 
 WHILE (V_START <= V_LENGTH) LOOP 
 V_INDEX := INSTR(P_STRING, P_DELIMITER, V_START); 
 
 IF V_INDEX = 0 THEN 
 PIPE ROW(SUBSTR(P_STRING, V_START)); 
 V_START := V_LENGTH + 1; 
 ELSE 
 PIPE ROW(SUBSTR(P_STRING, V_START, V_INDEX - V_START)); 
 V_START := V_INDEX + 1; 
 END IF; 
 END LOOP; 
 
 RETURN; 
END SPLITSTR; 

3 测试

select * from table(splitstr('Hello,Cnblogs!',',')); 

将行转为列显示：

select a.column_value v1,b.column_value v2 from 
(select * from (select rownum rn,t.* from table(splitstr
('Hello,Cnblogs!',',')) t)) a, 
(select * from (select rownum rn,t.* from table(splitstr
('Hello,Cnblogs!',',')) t)) b 
where a.rn=1 and b.rn=2;

转载自：http://www.2cto.com/database/201302/189173.html