How to compare the names and types columns of two tables?

Assume I have two tables aaa and bbb
How do I compare the columnnames and types of the two columns?
It should not matter if one of them has e.g. an additional index.
Furthermore it does not matter if the rows/row values differ.
Peter

SQL> desc emp
Nome                   Nullo?   Tipo
EMPNO                  NOT NULL NUMBER(4)
ENAME                           VARCHAR2(10)
JOB                             VARCHAR2(9)
MGR                             NUMBER(4)
HIREDATE                        DATE
SAL                             NUMBER(7,2)
COMM                            NUMBER(7,2)
DEPTNO                          NUMBER(2)
SQL> desc emp2
Nome                   Nullo?   Tipo
EMPNO                  NOT NULL NUMBER(4)
ENAME                           VARCHAR2(10)
MGR                             VARCHAR2(10)
HIREDATE                        DATE
SAL                             NUMBER(7,2)
COMM                            NUMBER(7,2)
DEPTNO                          NUMBER(2)
NEWCOL                          NUMBER
SQL> with t1 as
2 (select column_name, data_type from user_tab_columns where table_name='EMP'),
3 t2 as
4 (select column_name, data_type from user_tab_columns where table_name='EMP2')
5 Select a.column_name, a.data_type, b.column_name, b.data_type
6 from t1 a full outer join t2 b on a.column_name=b.column_name;
COLUMN_NAME                    DATA_TYPE                      COLUMN_NAME                    DATA_TYPE
EMPNO                          NUMBER                         EMPNO                          NUMBER
ENAME                          VARCHAR2                       ENAME                          VARCHAR2
                                                              NEWCOL                         NUMBER
MGR                            NUMBER                         MGR                            VARCHAR2
HIREDATE                       DATE                           HIREDATE                       DATE
SAL                            NUMBER                         SAL                            NUMBER
COMM                           NUMBER                         COMM                           NUMBER
DEPTNO                         NUMBER                         DEPTNO                         NUMBER
JOB                            VARCHAR2
Selezionate 9 righe.Max
http://oracleitalia.wordpress.com
Edited by: Massimo Ruocchio on Feb 21, 2010 1:27 AM
Changed query.

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Hi,
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