Oracle 字串分割

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分割函數一：

字串分割：

create or replace function Get_StrArrayLength
(
av_str varchar2, --要分割的字串
av_split varchar2 --分隔字元號
)
return number
is
lv_str varchar2(1000);
lv_length number;
begin
lv_str:=ltrim(rtrim(av_str));
lv_length:=0;
while instr(lv_str,av_split)<>0 loop
lv_length:=lv_length+1;
lv_str:=substr(lv_str,instr(lv_str,av_split)+length(av_split),length(lv_str));
end loop;
lv_length:=lv_length+1;
return lv_length;
end Get_StrArrayLength;

字串提取：

create or replace function Get_StrArrayStrOfIndex(  av_str varchar2,  --要分割的字串  av_split varchar2,  --分隔字元號  av_index number --取第幾個元素)return varchar2is  lv_str varchar2(1024);  lv_strOfIndex varchar2(1024);  lv_length number;begin  lv_str:=ltrim(rtrim(av_str));  lv_str:=concat(lv_str,av_split);  lv_length:=av_index;  if lv_length=0 then      lv_strOfIndex:=substr(lv_str,1,instr(lv_str,av_split)-length(av_split));  else      lv_length:=av_index+1;     lv_strOfIndex:=substr(lv_str,instr(lv_str,av_split,1,av_index)+length(av_split),instr(lv_str,av_split,1,lv_length)-instr(lv_str,av_split,1,av_index)-length(av_split));  end if;  return  lv_strOfIndex;end Get_StrArrayStrOfIndex;

 

分割函數二：

--本函數可以將“目標字串”以“指定字串”進行拆分，並通過表結構返回結果。代碼如下：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;

案例一：

select Get_StrArrayLength(‘HJJHTSCYJD_TB13522018,HJJHTSCYJD_2012_TB13632018,HJJHTSCYJD_2013_TB13642018,HJJHTSCYJD_2014_TB13652018,HJJHTSCYJD_2015_TB13662018,HJJHTSCYJD_2016_TB13672018,HJJHTSCYJD_2017_TB16522018‘,‘,‘) from dual;

案例二：

select GET_STRARRAYSTROFINDEX(‘HJJHTSCYJD_TB13522018,HJJHTSCYJD_2012_TB13632018,HJJHTSCYJD_2013_TB13642018,HJJHTSCYJD_2014_TB13652018,HJJHTSCYJD_2015_TB13662018,HJJHTSCYJD_2016_TB13672018,HJJHTSCYJD_2017_TB16522018‘,‘,‘,1) from dual;

案例三：

select * from table(splitstr(‘HJJHTSCYJD_TB13522018,HJJHTSCYJD_2012_TB13632018,HJJHTSCYJD_2013_TB13642018,HJJHTSCYJD_2014_TB13652018,HJJHTSCYJD_2015_TB13662018,HJJHTSCYJD_2016_TB13672018,HJJHTSCYJD_2017_TB16522018‘,‘,‘));

案例四：對各個表總資料求和

SELECT sum("count") FROM(select count(1) "count" from HJJHTSCYJD_TB13522018 union all  select count(1) "count" from HJJHTSCYJD_2012_TB13632018 union all  select count(1) "count" from HJJHTSCYJD_2013_TB13642018 union all  select count(1) "count" from HJJHTSCYJD_2014_TB13652018 union all  select count(1) "count" from HJJHTSCYJD_2015_TB13662018 union all  select count(1) "count" from HJJHTSCYJD_2016_TB13672018 union all select count(1) "count" from HJJHTSCYJD_2017_TB16522018);

 

Oracle 字串分割