Question

我创建了表格，通过其中一个嵌套表格进行链接：

function somemethod(value){
    #{backingbean.test(value)}
}

现在我需要CREATE VIEW来显示表B中来自A的嵌套数据的数据。它类似于

CREATE TABLE A (
  NAME VARCHAR(150) ,
  ID INTEGER PRIMARY KEY
) ;

CREATE TYPE A_LIST IS TABLE OF integer;

CREATE TABLE B (
  NAME VARCHAR(150),
  ID INTEGER PRIMARY KEY,
  LIST A_LIST 
) NESTED TABLE LIST STORE AS LIST_TABLE;

但我被困在那个点（

Answer 1

如果你想根据嵌套ID加入表B和A - 这里是一个例子。

一些测试数据

 insert into b
 values ('x',1, A_LIST(1,2,3));

 insert into a values ('A1',1);
 insert into a values ('A2',2);
 insert into a values ('A3',3);

主要步骤是表B与嵌套表from b, table(b.list)的连接。嵌套ID返回为COLUMN_VALUE;休息是简单的加入

 select b.id, b.name, a.name a_name, a.id a_id   from b, table(b.list) ba, a
 where ba.column_value = a.id;

结果

         ID SUBSTR(B.NAME,1,5) A_NAME       A_ID        
         ---------- ------------------ ------ ----------  
         1 x                  A1              1           
         1 x                  A2              2  
         1 x                  A3              3

Answer 2

create type record_for_a is object( a varchar2(150), id number);
create type l_record_for_a is table of record_for_a;


select table_b.name, table_b.id, 
 cast( multiset (select record_for_a(aa.name,aa.id) from a aa, table(table_b.list) bb where aa.id = bb.column_value) as l_record_for_a)  
 neste_col_a
 from 
b table_b;

PL / SQL：带有id和创建视图的嵌套表

2 个答案: