Need help SQL

Question

Hi Friends,
Having a table containing these three values in different records (any combination) for
a single primary id.
Oracle DB 10g EE Release 10.2.0.3.0 - 64bi
EXAMPLE
123 AAA     
123 AAA
124 AAA
124 AAA
124 BBB
125 AAA
125 BBB
125 CCCNeed to identify in which group does that primary key belong and I need to assign a value for that.
Currently I have a function for this req and am calling it from my SELECT query and it takes more time.
Can it be done in any other way. Please advice.
Marlon

Answer 1

Hi, If you are using Oracle 11g then, below sql gives your desired output.
with t as
      select 123 Val1, 'AAA' Val2 from dual union all
      select 123, 'AAA' from dual union all
      select 124, 'AAA' from dual union all
      select 124, 'AAA' from dual union all
      select 124, 'BBB' from dual union all
      select 125, 'AAA' from dual union all
      select 125, 'BBB' from dual union all
     select 125, 'CCC' from dual
select val1,val2,length(val2)-length(replace(val2,','))+1
from
select val1,listagg(val2,',') within group (order by val1) val2
from (select distinct val1,val2 from t)
group by val1)
/If you are working on 9i, u can use the below sql
with t as
      select 123 Val1, 'AAA' Val2 from dual union all
      select 123, 'AAA' from dual union all
      select 124, 'AAA' from dual union all
      select 124, 'AAA' from dual union all
      select 124, 'BBB' from dual union all
      select 125, 'AAA' from dual union all
      select 125, 'BBB' from dual union all
     select 125, 'CCC' from dual
select val1,val2,length(val2)-length(replace(val2,','))+1
from
select val1,
rtrim (xmlagg (xmlelement (e, val2 ||',')).extract ('//text()'), ',') val2
from (select distinct val1,val2 from t)
group by val1)
/