oracle 查询全部表的记录数 SQL

oracle 查询所有表的记录数 SQL
oracle 查询所有表的记录数 SQL 
create or replace function count_rows(table_name in varchar2,
                              owner in varchar2 default null)
return number
authid current_user
IS
   num_rows number;
   stmt varchar2(2000);
begin
   if owner is null then
      stmt := 'select count(*) from "'||table_name||'"';
   else
      stmt := 'select count(*) from "'||owner||'"."'||table_name||'"';
   end if;
   execute immediate stmt into num_rows;
   return num_rows;
end;

2、然后通过计算函数进行统计
select table_name, count_rows(table_name)  nrows from user_tables order by nrows desc

上面的数据需要验证