使用两个表创建视图

Question

我要创建一个视图（贷款总额-存款总额）使用 table loan_b 和 deposit_b 怎么可能？
并使用 loan_b table 创建另一个视图，每笔贷款的亲子关系 (20%)。 table 如下：

以下是我用于 table 的查询：

CREATE TABLE loan_b( cust_id VARCHAR2(10), loan_id VARCHAR2(10), loan_amount NUMBER(10) ); 

INSERT INTO loan_b VALUES(100,'100A',28500);

INSERT INTO loan_b VALUES(102,'100B',2500);

CREATE TABLE deposit_b( cust_id VARCHAR2(10), deposit_amount NUMBER(10) ); 

INSERT INTO deposit_b VALUES(99,51700); 

INSERT INTO deposit_b VALUES(99,2462);

INSERT INTO deposit_b VALUES(55,55200);

Answer 1

您可以轻松地创建一个视图 select 然后一旦您确定了您需要的 select 您就可以创建您的视图例如：

create view your_view_name as 
select 
   a.cust_id cust_id
 , a.loan_id load_id
 , a.loan_amount loan_amount
 , b.deposit_amount deposit_amount
from loan_b a
inner join deposit_b on a.cust_id = b.cust_id;

或者如果您只需要总和

create view your_view_name2 as 
select 
   sum(a.loan_amount) sum_loan_amount
 , sum(b.deposit_amount)  sum_deposit_amount
from loan_b a
inner join deposit_b on a.cust_id = b.cust_id;

对于 diff 你应该使用（我已经用原来的 tablename 改变了 table 别名）

create view your_view_name3 as 
select 
   loan_b.loan_amount - deposit_b.deposit_amount   diff_load_deposit_amount
from loan_b 
inner join deposit_b on loan_b.cust_id = deposit_b.cust_id;

使用两个表创建视图

Create View using two tables

sql

oracle

oracle10g

oracle-sqldeveloper