Counting across views & comparing

Question

I have several views all of which have the following structure:
id number
value number
Now in a loop, I have the names of all the views I'm interested in. From the list of those views, I do a count grouping by the id as:
select id,count(id) from myview group by id;
This will give me a list like:
id count
100 3
200 1
Now, I need to do a similar count in the second view and all the other views from my list. Upto this point its ok .But now, I need to sum up the similar values obtained from these views. For example in the second view if I got the following result:
id count
100 1
300 1
Then my final result should look like:
id count
100 4
200 1
300 1
Thats not enough.
After storing these final values somewhere, I need to compare each of these individual counts with the results obtained from a similar query on another table
by each id.
Any help will be greatly appreciated.

Answer 1

Thanks for the first part. But, it doesn't fit my requirement because I am getting the view name one by one in a loop and I can't do the union all at a time. I guess what I need is an array or a PL/SQL table to hold the values in each subsequent count and then keep on adding the values to the array. Then ultimately I need to compare the values in the array with the values I obtain from executing a query against a table. This will be like:
If the values in the array are:
myarray(id,count)
with the values(100,4) (200,1),(300,1)
Then I execute a query against a database table as:
select id, count(id) from mydatabasetable group by id;
Then I should be able to compare the values in the array/PL/SQL table with the results obtained by this query.For example: how many 100s, 200s.. are there in the array against how many 100s, 200s.. are there in the database table. I hope the problem is understandable now.