方法一select a.* ,
regexp_substr(a.rolecode ,'[^,]+',1,l) as rolecode
from p_user a,(select level l from dual connect by level<=100) b
where l <=length(a.rolecode) - length(replace(rolecode,','))+1
使用函式regexp_substr拆分字串：
5個引數
第乙個是輸入的字串
第二個是正規表示式
第三個是標識從第幾個字元開始正規表示式匹配。（預設為1）
第四個是標識第幾個匹配組。（預設為1）
第五個是是取值範圍：
i：大小寫不敏感；
c：大小寫敏感；
n：點號 . 不匹配換行符號；
m：多行模式；
x：擴充套件模式，忽略正規表示式中的空白字元。
select a.*,regexp_substr(servicereqid ,'[^;]+',1,l) as servicereq
from sum_portal_satisfaction a,(select level l from dual connect by level<=100) b
where l <=length(servicereqid) - length(replace(servicereqid,';'))+1
order by 1,2;
----select level l from dual connect by level<=100; 生成1到100的資料行。
----l <=length(servicereqid) - length(replace(servicereqid,';'))+1，注意此處是『l』並非『1』，上面的regexp_substr的第四個引數也一樣。
---下面為拆分字串，再進行的行轉列
create or replace view v_sum_portal_satisfaction_sr as
select
survey_type,
survey_time,
center_code,
center_name,
city_id,
city_name,
regexp_substr(servicereqid ,'[^;]+',1,l) as servicereqid,
regexp_substr(servicereqname ,'[^;]+',1,l) as servicereqname,
sum(decode(survey_value,0, sur_times,null)) giveup_times,--調查值 -1:未處理 0:使用者放棄 1:很滿意 2.滿意 3.對csr不滿意 4.對其它不滿意
sum(decode(survey_value,1, sur_times,null))vsatis_times,
sum(decode(survey_value,2, sur_times,null))satis_times,
sum(decode(survey_value,3, sur_times,null))ncsr_times,
sum(decode(survey_value,4, sur_times,null))nelse_times,
sum(sur_times) sur_times
from sum_portal_satisfaction a,(select level l from dual connect by level<=100) b
where l <=length(servicereqid) - length(replace(servicereqid,';'))+1
group by
subslevelid,
center_code,
center_name,
city_id,
city_name,
survey_type,
survey_time,
servicereqid,
servicereqname,l
方法二:
create table testtable (
id nvarchar2(200) primary key not null ,
content nvarchar2(200) not null
)insert into testtable values ('4','館內idx_10館外idx_11總體idx_12');
select * from table ( cast (fn_split(('館內idx_1$館外idx_2$總體idx_3$') ,'$') as ty_str_split ) )
select * from testtable b left join table (fn_split((content), '$') ) a on 1=1;
--實現split函式
create or replace type ty_str_split is table of varchar2 (4000);
create or replace function fn_split (p_str in varchar2, p_delimiter in varchar2)
return ty_str_split
isj int := 0;
i int := 1;
len int := 0;
len1 int := 0;
str varchar2 (4000);
str_split ty_str_split := ty_str_split ();
begin
len := length (p_str);
len1 := length (p_delimiter);
while j < len
loop
j := instr (p_str, p_delimiter, i);
if j = 0
then
j := len;
str := substr (p_str, i);
str_split.extend;
str_split (str_split.count) := str;
if i >= len
then
exit;
end if;
else
str := substr (p_str, i, j - i);
i := j + len1;
str_split.extend;
str_split (str_split.count) := str;
end if;
end loop;
return str_split;
end fn_split;
declare
cursor c
isselect * from table ( cast (fn_split(('館內idx_1$館外idx_2$總體idx_3$') ,'$') as ty_str_split ) );
r c%rowtype;
begin
open c;
loop
fetch c into r;
exit when c%notfound;
dbms_output.put_line (r.column_value);
end loop;
close c;
end;
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