Counting the values in comma separated string

Question

Hi I've the following requirement .
The input is like below:
  with test as
  (select 'ABC,DEF,GHI,JKL,MNO' mystring from dual   union all
    select 'ABC,DEF'  from dual union all
    select 'JKL,MNO' from dual )  
    select * from testAnd the output should be lile below
str            cnt
'ABC'        2
'DEF'        2
'GHI'        1
'JKL'         2
'MNO'       2I tried the following query to get like above but getting the wrong output
  with test as
  (select 'ABC,DEF,GHI,JKL,MNO' mystring from dual   union all
    select 'ABC,DEF'  from dual union all
    select 'JKL,MNO' from dual )  
    select str,count(*) from (
    select regexp_substr(mystring,'[^,]+',1,level) str
        from test
     connect by level <= length(regexp_replace(mystring,'[^,]+')) + 1 )
     group by strPlease help me to get the ouput as required
Thanks

Answer 1

You are almost close:
WITH test AS
        (SELECT 'ABC,DEF,GHI,JKL,MNO' mystring FROM DUAL
         UNION ALL
         SELECT 'ABC,DEF' FROM DUAL
         UNION ALL
         SELECT 'JKL,MNO' FROM DUAL)
  SELECT str, COUNT (*)
    FROM (    SELECT REGEXP_SUBSTR (mystring,
                                    '[^,]+',
                                    1,
                                    LEVEL)
                        str
                FROM (SELECT ROWNUM r, test.* FROM test) test
          CONNECT BY     LEVEL <= REGEXP_COUNT (mystring, ',') + 1
                     AND PRIOR SYS_GUID () IS NOT NULL
                     AND r = PRIOR r)
GROUP BY str
ORDER BY 1Output:
STR     COUNT(*)
ABC     2
DEF     2
GHI     1
JKL     2
MNO     2Cheers,
Manik.