방법1) SQL*plUS에서 각각의 TABLE에 대하여 ANALYZE를 실행하면
        USER_TABLES Data Dictionary에 각각의 record 건수가 등록된다.

방법2) SQLplUS에서 pl/SQL Program으로 처리한다.
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create or replace procedure row_cnt
is
   cursor_name     integer;
   rows_processed  integer;
   rowcnt          number := 0;
   cursor c1 is select table_name from user_tables;
begin
   cursor_name := dbms_sql.open_cursor;
   for i in c1 loop
       dbms_sql.parse(cursor_name,
                      `select count(*) from `|| i.table_name,
                      dbms_sql.v7);
       dbms_sql.define_column(cursor_name,1,rowcnt);
       rows_processed := dbms_sql.execute(cursor_name);
       if dbms_sql.fetch_rows(cursor_name)> 0 then
          dbms_sql.column_value(cursor_name,1,rowcnt);
          dbms_output.put_line(rpad(i.table_name,30,` `)||` `
                               ||lpad(to_char(rowcnt),12,` `));
     end if;
   end loop;
   dbms_sql.close_cursor(cursor_name);
end;
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