建測試表

create table t_A
(
  id   VARCHAR2(36) not null,
  name VARCHAR2(100),
  age  NUMBER,
  sex  VARCHAR2(2)
);

insert into t_A (id, name, age, sex)
values ('1', '1', 1, '1');
insert into t_A (id, name, age, sex)
values ('2', '2', 2, '2');
commit;


create table t_B
(
  id    VARCHAR2(36) not null,
  name  VARCHAR2(100),
  age   NUMBER,
  clazz VARCHAR2(36)
);

insert into t_B (id, name, age, clazz)
values ('1', '1', 1, '1');
insert into t_B (id, name, age, clazz)
values ('2', '2', 1, '3');
insert into t_B (id, name, age, clazz)
values ('3', '3', 3, '3');
commit;
 

計算

---
select t.*,rowid from  t_A t; 
select t.*,rowid from  t_B t;
---
/*1.比較表結構 */
(select column_name
          from user_tab_columns
         where table_name = 'T_A'
        minus
        select column_name
          from user_tab_columns
         where table_name = 'T_B')
union 
(select column_name
         from user_tab_columns
        where table_name = 'T_B'
       minus
       select column_name
         from user_tab_columns
        where table_name = 'T_A');
        

/* 2.比較表資料 */
(select *
          from t_A
        minus
        select * from t_B)
union 
(select *
         from t_B
       minus
       select * from t_A)