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

The table in your schema that has max rows:

with data as 
(
 select table_name,
        to_number(extractvalue(xmltype(
                  dbms_xmlgen.getxml (
                 ' select count(*) c from ' || table_name)),
                  '/ROWSET/ROW/C')) countrows
 from   user_tables
)
select table_name, countrows
from   data 
where  countrows = (select max(countrows)
                    from   data);

dbms_xmlgen.getxml(' select .... ') is extremely flexible.