如何在sql中的单个视图中加入两个视图？

Question

例如，我有两个视图要合并为单个视图

视图 1 定义为：

CREATE VIEW view1 AS
select DV.demValueId,DV.value,DE.demElementId,DE.name,
       DES.demElementSetGroupId,DR.demRecordId,DR.name as Role,
       DR.demClusterSetGroupRef,L.EmailId 
from DemographicsDataValue DV 
inner join DemographicsElement DE 
      on DV.demValueId=DE.demValueRef 
inner join DemographicsElementSet DES 
      on DE.demElementId=DES.demElementRef 
inner join DemographicsRecord DR 
     on DR.demElementSetGroupRef=DES.demElementSetGroupId 
inner join LoginDetail L 
     on DR.demRecordId=L.demRecordIdRef

视图 2 定义为：

CREATE VIEW view2 
AS
select DV.valueId, DV.value,E.ElementId,E.name,
       ES.ElementSetGroupId,ET.entryId,ET.name as E_Name,
       ET.SystemDateTime,C.compositionId,C.linkSetRef 
from DataValue DV 
inner join Element E 
      on DV.valueId=E.valueRef 
inner join ElementSet ES 
      on E.ElementId=ES.ElementRef 
inner join Entry ET 
      on ES.elementSetGroupId=ET.elementSetGroupRef 
inner join EntrySet ESG 
      on ESG.entryRef=ET.entryId 
inner Join Section S 
      on s.entrySetGroupRef=ESG.entrySetGroupId 
inner join SectionSet SS 
      on SS.sectionRef=S.sectionId 
where S.name='Appointment'

如何将它们组合成一个视图 select * from View1 Select * from View2

输出到单个查询

请帮忙

Answer 1

如果你想要常见的字段，你可以这样做：

select * FROM View1
inner join View2 -- or you can do a left join here
on View1.Column = View2.Column -- and ... add more if needed

如果两者的表结构相同并且您不关心重复项，则可以执行union allif 您关心重复项union

select * from View1
union all
select * from View2

Answer 2

union如果您有同质色谱柱，请使用。Join否则在合适的领域使用

SELECT *
FROM view1
INNER JOIN view2 ON view1.id = view2.ref;

需要更多详细信息才能了解要使用哪个联接以及在哪些字段上使用。