Identify a table with maximum rows in Oracle

Question

I have a set of tables in Oracle and I would like to identify the table that contains the maximum number of rows.

So if, A has 200 rows, B has 345 rows and C has 120

Answer 1

select max(select count(*) from A union select count(*) from B...)

should work.

edit: if you want something dynamic, you can build a string in PL/SQL with each "count(*)" subquery (for example, listing the table names from USER_TABLES), and then execute te main query with:

execute immediate 'select max('||subquery||')'