Want to fetch two rows values into a single sql result

Question

Let me first explain the situation first
I am having two tables
1. Animal_details(animal_id,and other details)
2. Animal_weight(animal_id,seq_no,weight,date_weighed)
here actually situation is that for each weight I am inserting a new row with seq_no say
1 for first weight
2 for second weight ....
with their weight and date
eg. animal_id = 1, seq_no = 1, weight = 200, date_weighed = 12-may-2000;
animal_id = 1, seq_no = 2, weight = 250, date_weighed = 12-june-2000;
means seq_no = 1 represents 1st weight of animals
seq_no = 2 represents 2nd weight of the animals
like this an animal can have any no. of times weighted.
now what I want is that I want to show a result with
animal_id,weight_1,weight_2 with other animal details in a single row
how can I have both first weight and the second or more weights in same row for any animal?
Please Reply soon, Its urgent.
Thanks

Answer 1

You can't issue an SQL with 100% dynamic column list. What you can do is issues something like:
with t as (
           select  animal_id,
                   max(case seq_no = 1 then weight end) first_weight,
                   max(case seq_no = 2 then weight end) second_weight,
                   max(case seq_no = 3 then weight end) third_weight
             from  animal _weight
             where seq_no <= 3
             group by animal_id
select  t1.animal_id,
        first_weight,
        second_weight,
        third_weight,
        other_details
  from  t t1,
        animal_details t2
  where t2.animal_id = t1.animal_id
/SY.