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Oracle拆分字符串函数

本函数可以将“目标字符串”以“指定字符串”进行拆分,并通过表结构返回结果。代码如下: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     PIPELINEDAS    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:2009-9-9-11.38.15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)) bwhere a.rn=1 and b.rn=2如图:2009-9-9-11.44.53

 

Oracle拆分字符串函数