General ETL question - ETL from unknown number of tables ?

AFAIK, ETL integrates data from a fixed number of sources/tables. Is it possible that ETL can integrate data from an unknown number of tables which might be added in the future, given that these tables might be of different types (customer, shipping, employee,
accounting etc.) ? Are there any solutions in SSIS which handle these kinds of scenarios ?
EDIT -
Let A,B,C be tables. We can have the following ETL scenarios - A + B + C = 1 row or A + B + C = 3 rows
I have the first one. Later, we can add tables D,E,F,G...etc all of which might be different from each other in terms of the data they contain.

AFAIK, ETL integrates data from a fixed number of sources/tables. Is it possible that ETL can integrate data from an unknown number of tables which might be added in the future, given that these tables might be of different types (customer, shipping, employee,
accounting etc.) ? Are there any solutions in SSIS which handle these kinds of scenarios ?
EDIT -
Let A,B,C be tables. We can have the following ETL scenarios - A + B + C = 1 row or A + B + C = 3 rows
I have the first one. Later, we can add tables D,E,F,G...etc all of which might be different from each other in terms of the data they contain.
Another Suggestion could be, which might not satisfy your reqt fully but would help you as for me once a new source comes in you need to study it fully before population the new source could be excel .txt sql oracle etc, so it goes like below
a) Use a Master Child package configuration, so int this case your MASTER package calls table load for your table A B and c.
b) Once a new load has to be added you would need to design a new package and add it to the solution.
c) The master package would not need to be changed the trick here is:
1. Use a foreach loop in the Master packge, this for each loop is driven from a table in DB, which has the deatils around the Desttable load; so lets say today it has values like:
DestTable LoadedFrom
TableD A
TableD B
TableD C
Now once new tables have to added just add an entry to this table and the master package would need not be changed only a new package and table entry has to done
Abhinav http://bishtabhinav.wordpress.com/
Thanks. It seems that you are talking about something that can me merged or union-ed. A,B,C can be different types - customer, shipping, accounting info etc. I need to join them based on different criteria. Perhaps a
table can store the joining criteria. Also, I need to select only some columns of each table added. So, I will need a table to store which columns are to be selected for a particular table. 
I am not sure if your suggestion would apply here.

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