oracel 拆分字符串

it2024-12-04  19

CREATE OR REPLACE TYPE str_split IS TABLE OF VARCHAR2 (4000); CREATE OR REPLACE FUNCTION splitstr(p_string IN VARCHAR2, p_delimiter IN VARCHAR2) RETURN str_split PIPELINED AS 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;

创建完毕后,我们来测试一下,例如执行如下SQL:

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

其输出结果为一个两行的表,如下图:

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

如图:

作者:李敬然(Gnie) 出处: {GnieTech} (http://www.cnblogs.com/gnielee/)     方法二、 select regexp_substr('Hello,Cnblogs!','[^,]+',1,level) from dual connect by level <= length('Hello,Cnblogs!')-length(REPLACE('Hello,Cnblogs!',',',''))+1;

转载于:https://www.cnblogs.com/isoftware/p/4337273.html

相关资源:Oracle拆分字符串,字符串分割的函数
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