I have table 1 like this:

Table 2 like this

Is it possible to get result like this using SQL statement?:

It means that, if id 1 has 3 countries and 1 color --> The result should return only 3 countries and 1 color in any order (and color can be in the same row with any country). Generally, if id 1 has m countries and n color --> The result should return only m countries and n colors ? Thank you very much <3

Note: I'm using Oracle Database

CodePudding user response：

You can number your countries and colors per ID and then use a full outer join on the ID and that number:

with cntr as
(
  select id, row_number() over (partition by id order by country) as subid, country
  from country
)
, clr as
(
  select id, row_number() over (partition by id order by color) as subid, color
  from color
)
select id, cntr.country, clr.color
from cntr full outer join clr using (id, subid)
order by id, subid nulls last;

Demo: https://dbfiddle.uk/?rdbms=oracle_18&fiddle=e74ece8cb4571d7998014f8c55bd8d7a

CodePudding user response：

with src as (
select n.id,n.country,l.color, 
(select count(id)-1 
from countries where id=n.id)  total_countries
,(
select count(id)-1
from colors where id=l.id
) total_colors
from countries  n
inner join colors  l
on n.id = l.id
)
select 
id, 
country, 
lag(color, total_countries) over (partition by id order by color) color 
from 
src 
where total_countries > 0
union all
select 
id, 
lag(country, total_colors) over (partition by id order by country) country
,color
from 
src 
where total_colors > 0
order by id, country nulls last, color nulls last

fiddle