Need advice on how to create report

Question

I'm not sure how to do this, so I'm asking advice from the apex gods...
here is the issue, I have two tables that I need to combine info from. not an issue in its self. I can do that. but here is the issue. in Table A I have some data like disc_id, title, theids, etc.. Table B contains fullname, theid, emplid
now in table A the column 'theids' is populated from apex as a multi select list. so the values in the column is something like 48;3;88
it got these id numbers from the Table B query (lov popup) that returns theid of the person chosen.
now I have to create a report that will be used in a excel download and what they want is one line per disc_id and they want the more useful 'emplid' in the field where 'theids' are at. that is instead of :
disc_id Title theids
101 Test 48;3;88
they want:
disc_id Title Theids
101 test N33456,N3457,N43562
so I'm kind of stuck, I can figure out how to write a sql using instr to get something like this:
101 test N33456
101 test N3457
etc
but that is not what they want. so I'm thinking I need to create a package to do this and return some sort of values. the problem is I can't figure out how I can substitute the 48;3;88 for N33456,N3457,N43562
I'm still new at this pl/sql and apex stuff so sorry if this seems to have some obvious answer.

Answer 1

I might be dense so forgive me on this, but I don't think that will solve it.
your example uses field from apex, like :P3_SOME _VALUE
this report screen has no fields. there are no :P#_ type values to pull. I'm writing a report screen using a report template.
all the data I need for the report exists within the table. I just need to display it the way they want.
I could do just a:
select *
from my_table
and it would create the report just fine. the only issue is one of the columns would have 48:3:88 in the field. which to a person reading the report means little. so i have no apex fields to pull.
I was trying to write a pl/sql function that would substitute those delimited values with meaningful data. but when I do I get multiple rows and I can't have that. so my choices so far I see are..
1) create the report with a simple select leaving the data as is
2) create report that has multiple rows of data where each instr value now has the correct names (some have 2 some have 5, big list to read of dups)
3) create a package that populates a temporary table with the data I need then select on that table to get the report.
right now I'm thinking #3 is the only way to get what I want. By the way your examples would be a great help in doing that I can already see that I can use some of them to create a temp table with that data.
what I was hoping for was some option that I don't understand or missed that a more experienced person would know. but its looking grim.
I thank you all the info you have given, its been a great deal of info that I can use at some point, but so far I don't think it will solve my issue.