Oracle deaggregating

Hi,
I have a string that is concatenated as abc;ABC;ABC;DEF. I would like to reduce it to ABC;DEF. The number of repeats are arbitary and not restricted to 3. How can I do that
in Oracle?
LuckyLucksAsked:
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slightwv (䄆 Netminder) Commented:
Given some table with two columns:  some_pk and mystring.

Try this:
select some_pk, listagg(mystring,';') within group(order by mystring) mylist
from (
select distinct some_pk,
	upper(regexp_substr(mystring,
					'[^;]+',
					1,
					column_value)) mystring
from mydata,
	table(select collect(level)
				from dual
			connect by level <= length(mystring) - length(replace(mystring, ';')) + 1)
)
group by some_pk
/

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sdstuberCommented:
If you have the str2tbl function it's fairly simply syntax


SELECT LISTAGG(COLUMN_VALUE, ';') WITHIN GROUP (ORDER BY COLUMN_VALUE)
  FROM yourtable, TABLE(SET(str2tbl(UPPER(your_column), ';')))

If you don't, you can find a version of it here:
https://www.experts-exchange.com/questions/27233295/Parsing-string-in-Oracle.html
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