Parsing question

Question

I feel like I know how to do this but I was wondering if anyone would have any better ideas.
I have table that stores an id, sequence number, and column for text (4000 BYTES). What I need to do is parse, based on either one or two words on the text column. Now the complete text could be in 1 to a bunch or rows. All records would have the same id but increasing sequence numbers. My idea is to loop through the records based on id and have some logic to search for those rows or place all the records for an id into a collection and loop it. There has to be a better way to do it than this. This might be taking a step backwards but could I fetch all the records into a string and parse it. I think this could cause memory problems if there are a lot of row with the same id.
caveat: I can't change the column to something else.
Any help would be appreciated.

Answer 1

you can try
select *
from
  (select your_id_col,
    dbms_xmlgen.convert(extract(xmlagg(xmlelement(e, your_text_col || ' ') order by your_sequence_col) ,'//text()').getclobval(),1) txt
  from your_table
  group by your_id_col
where lower(txt) like '%your_search_text%' and lower(txt) like '%your_search_text_2%' and .....