合并2个Oracle表

Question

我有2个表A和B，其中包含以下数据:(我使用的是oracle 11g）

我需要根据字段“Code”将上面的2个表合并到1个表中。这个插图只是我工作中更大问题的简化版本。基本上，我有一个结构存储在B中的表单和存储在A中的响应。但是，保存响应的表A不保留存储在B中的标题。在报告中，我需要打印标题以及响应。无论如何，不​​想让问题复杂化，我正在寻找的结果是以下格式：

使用select，join和可能的联合生成我想要的结果是否可行？我不能让它发挥作用。到目前为止，我能提出的陈述是：

select * from b left outer join a
on b."Code"= a."Code"

但结果并不是我想要的。如果没有创建格式化程序，这是否可行。理想情况下，它应该放在视图中

以下是生成测试数据的脚本：

  CREATE TABLE "A" 
   (    "Id" NUMBER, 
    "Row" NUMBER, 
    "Description" VARCHAR2(20 BYTE), 
    "Type" NUMBER, 
    "Answer" VARCHAR2(20 BYTE), 
    "Code" VARCHAR2(20 BYTE), 
    "ClientId" NUMBER
   )  ;

Insert into A ("Id","Row","Description","Type","Answer","Code","ClientId") values (1,1,'Question 1',2,'ABC','QCONTROL',1000);
Insert into A ("Id","Row","Description","Type","Answer","Code","ClientId") values (2,3,'Question 2',2,'DEC','QCONTROL',1000);
Insert into A ("Id","Row","Description","Type","Answer","Code","ClientId") values (1,1,'Question 1',2,'XYZ','QCONTROL',2000);
Insert into A ("Id","Row","Description","Type","Answer","Code","ClientId") values (2,3,'Question 2',2,'STU','QCONTROL',2000);
Insert into A ("Id","Row","Description","Type","Answer","Code","ClientId") values (3,1,'Question 5',3,'JKL','QCONTROL',3000);


  CREATE TABLE "B" 
   (    "Id" NUMBER, 
    "Desc" VARCHAR2(20 BYTE), 
    "Row" NUMBER, 
    "Type" NUMBER, 
    "Code" VARCHAR2(20 BYTE)
   )  ;

Insert into B ("Id","Desc","Row","Type","Code") values (10,'----------',2,0,'QCONTROL');
Insert into B ("Id","Desc","Row","Type","Code") values (20,'**********',10,0,'OTHER');

Answer 1

这就是你想要的吗？

with res as(
select "Id" , "Row" , "Description" ,  "Type" , "Answer", "Code", "ClientId" from A

union all

select B."Id" as "Id" , B."Row" as "Row" , B."Desc" as "Description",
 B."Type" as "Type", null as "Answer", B."Code" as "Code", A1."ClientId" as "ClientId"
 from B inner join (select distinct "ClientId", "Code" from A) A1 ON B."Code"= A1."Code"
 ) 
select * from res order by "Code", "ClientId", "Answer"

SqlFiddle Link

Answer 2

我不确定语法（我不在oracle实例前面......），但我的脚本可以作为一个起点。

Select * from
(Select Id, '9999' as Row, Desc,0 as type, B.Code, A.ClientId
from B, A
where A.Code=B.Code 
union all
Select * from A) ab
order by ab.ClientId, ab.row

我把一个＆＃39; 9999＆＃39;在Row中以正确的方式排序。 我希望它能有所帮助！

Answer 3

抱歉，我无法理解您的确切要求，但下面提到的查询将返回结果，如屏幕截图所示。我已经重命名了像Row to Row1这样的列，因为我不喜欢在查询中使用双引号。

WITH subqueryfactoring AS
  (SELECT A.id,
    A.row1,
    A.description,
    A.type1,
    A.answer,
    A.code,
    A.clientid
  FROM A
  INNER JOIN B
  ON A.code=B.code

  UNION

  SELECT B.id,
    B.row1,
    B.desc1,
    B.type1,
    NULL,
    B.code,
    A.clientid
  FROM A
  INNER JOIN B
  ON A.code=b.code
  )
SELECT * FROM subqueryfactoring ORDER BY clientid, id nulls last;