PL/SQL-find out extra rows present in table by comparing 2 similar tables

Question

Hi, can any one give me an idea to find out the extra rows present in table by comparing 2 similar tables using pl/sql.
REQUIREMENT::i am working on the upgrade environment.my previous database has some tables and having data.Now functional folks are adding some new data to the existing tables for the upgrade database.I need to identify that new rows which are added by them.
for this , i created name table with 2 columns n,n1 which contains the table names.
Table Name:Name
columns:n n1
a ax
b bx
c cx
a,b c........are the table names which are in the previous database environment.(approx >1500 tables)These tables having data.
ax,bx,cx..........table names which are in the upgrade environment contains the extra data which is added by the functional folks.
a&ax,b&bx.................(approx 1500 tables) are having same structure except some of them.
Now i want to write a pl/sql program that reads both table names a&ax from name table and then by comparing the rows of a&ax ,i need to find out the extra rows present in the ax table to store that in different place.
Example:
a table
id name
1 co
2 wi
3 il
ax table
id name
1 co
2 wi
3 il
4 va
5 ca
Here i need to find out the difference b/n the 2 tables ,the extra rows id 4,5 and place it some where.

Answer 1

this is just for demo, is this you mean?
SQL> ed
Wrote file afiedt.buf
  1  SELECT empno,ename,e.DEPTNO emp_deptno, d.deptno dept_deptno,d.DNAME
  2  FROM EMP e full outer join DEPT d
  3* on d.DEPTNO= e.DEPTNO
SQL> /
     EMPNO ENAME      EMP_DEPTNO DEPT_DEPTNO DNAME
      7934 MILLER             10          10 ACCOUNTING
      7839 KING               10          10 ACCOUNTING
      7782 CLARK              10          10 ACCOUNTING
    snipp........
      7521 WARD               30          30 SALES
      7499 ALLEN              30          30 SALES
      156 1
12 1
40 OPERATIONS
90 LOGISTIC
18 rows selected.
SQL> ed
Wrote file afiedt.buf
  1  SELECT empno,ename,e.DEPTNO emp_deptno, d.deptno dept_deptno,d.DNAME
  2  FROM EMP e left outer join DEPT d
  3* on d.DEPTNO= e.DEPTNO
SQL> /
     EMPNO ENAME      EMP_DEPTNO DEPT_DEPTNO DNAME
      7934 MILLER             10          10 ACCOUNTING
      7839 KING               10          10 ACCOUNTING
      7782 CLARK              10          10 ACCOUNTING
      7902 FORD               20          20 RESEARCH
    snipp..................
      7654 MARTIN             30          30 SALES
      7521 WARD               30          30 SALES
      7499 ALLEN              30          30 SALES
       156 1
12 1
16 rows selected.
SQL> ed
Wrote file afiedt.buf
  1  SELECT empno,ename,e.DEPTNO emp_deptno, d.deptno dept_deptno,d.DNAME
  2  FROM EMP e[b] right outer join  DEPT d
  3* on d.DEPTNO= e.DEPTNO
SQL> /
     EMPNO ENAME      EMP_DEPTNO DEPT_DEPTNO DNAME
      7369 SMITH              20          20 RESEARCH
      7499 ALLEN              30          30 SALES
      7521 WARD               30          30 SALES
      7566 JONES              20          20 RESEARCH
      snipp......................
      7902 FORD               20          20 RESEARCH
      7934 MILLER             10          10 ACCOUNTING
                                         40 OPERATIONS
90 LOGISTIC
16 rows selected.