Question

我正处于报告创建过程中。我通过这些表格结构来看，这真的很复杂。我无法创建一个视图。

我有两个结构表

DBObjectType
-------------
TypeID,
Description

和

DBObAssign
----------
ID
ReferenceObType
ReferenceObID
TargetObType
TargetObID

该表格填充如下：

DBObjectType table:

+--------+-------------------+
| TypeID  Description        |
+--------+-------------------+
| 1       Account            |
| 2       TFN                |
| 3       VDN                |
| 4       Skill              |
+--------+-------------------+

DBObAssign table
+----+-------------+---------+---------+--------+
| ID  RefObType    RefObID  TgtObType   TgtObID |
+----+-------------+---------+---------+--------+
| 1    1        12    2     23      |  => refer TFN Table
| 2    1        12    3     12      |  => refer VDN Table
| 3    1        23    4     1       |  => refer Skill Table
| 4    1        23    2     45      |  => refer TFN Table
| 5    1        23    4     31      |  =>refer Skill Table
+----+-------------+---------+---------+--------+

我的报告需要显示帐户的所有TFN，VDN和技能

布局就像：

+------+-------+------------+---------+     
|Account TFN    Skill         VDN |
+------+-------+------------+---------+
| 12    TFNof12       VDN@@@  |
| 23    TFNof23 Skill1of23            |
| 23        Skill2 of 23          |
+------+-------+------------+---------+

现在我只能与一张桌子联系。这意味着我只是加入帐户表以获取TFN详细信息。

select AccountName,TFN,Skill from tblAccount as acc 
left outer join tblDBAssign as DBA on DBA.RefObID = acc.id
left outer join tblDBobject as DBo on DBo.Description= 'TFN'

有没有办法从技能和vdn表中获取其他记录？请提供一些建议。

的表格结构

VDN:
---
VDNID
VDNDesc

TFN:
----
TFNID
TFNOwner
TFNDesc

Skill:
------
SkillID
SkillDesc

Answer 1

你的脚本看起来应该是这样的（请注意，这不是测试，也不清楚表名，这与你在结构和sql示例中给出的不同）：

SELECT AccountName, t.TFNDesc, v.VDNDesc, s.SkillDesc 
FROM tblAccount AS acc 

LEFT OUTER JOIN tblDBAssign as DBA1 
    ON DBA1.RefObID = acc.id
LEFT OUTER JOIN tblDBobject as DBo1 
    ON DBo1.Description= 'TFN'
    AND DBA1.TgtObType =  DBo1.TypeID
LEFT OUTER JOIN TFN as t
    ON t.TFNID = DBA1.TgtObID

LEFT OUTER JOIN tblDBAssign as DBA2 
    ON DBA2.RefObID = acc.id
LEFT OUTER JOIN tblDBobject as DBo2 
    ON DBo2.Description= 'VDN'
    AND DBA2.TgtObType =  DBo2.TypeID
LEFT OUTER JOIN VDN as v
    ON v.VDNID = DBA2.TgtObID

LEFT OUTER JOIN tblDBAssign as DBA3 
    ON DBA3.RefObID = acc.id
LEFT OUTER JOIN tblDBobject as DBo2 
    ON DBo3.Description= 'Skill'
    AND DBA3.TgtObType =  DBo3.TypeID
LEFT OUTER JOIN Skill as s
    ON s.SkillID = DBA3.TgtObID

SQL从参考查找中的多个表连接到一个视图

1 个答案: