Question

我正在尝试搜索sqlite文件中的所有字段（列），但我一直没有得到有效的结果。这是代码。我应该尝试不同的东西吗？

Select * From session
join sessiontype using(SESSIONTYPEID)
join camera on SESSION.[CameraID] = camera.CameraID
join chemicals on session.[DeveloperID] = chemicals.[ChemicalsID] 
               or session.[FixerID] = chemicals.[ChemicalsID]
join shop on session.[DEVELOPEDBYID] = shop.[ShopID]
join film on session.[FilmID] = film.[FilmID]
join vendor on film.[VendorID] = vendor.[VendorID]
where session.[Identifier] like('%agfa%') 
or session.[Notes] like('%agfa%')
or sessiontype.[SessionTypeName] like('%agfa%')
or camera.[CameraName] like('%agfa%')
or chemicals.[ChemicalsName] like('%agfa%')
or session.[DeveloperTemp] like('%agfa%')
or session.[DeveloperTime] like('%agfa%')
or session.[FixerTemp] like('%agfa%')
or session.[FixerTime] like('%agfa%')
or shop.[ShopName] like('%agfa%')
or session.[StopBathTemp] like('%agfa%')
or session.[StopBathTime] like('%agfa%')
or vendor.[VendorName] like('%agfa%')
order by session.[Identifier], sessiontype.[SessionTypeName], session.[Date]

我只有一个包含'agfa'的条目。以下行两次返回1个条目：加入化学品会议。[DeveloperID] =化学品。[ChemicalsID] 或会话。[FixerID] =化学品。[ChemicalsID]

以下条目不返回任何结果：加入化学品会议。[DeveloperID] =化学品。[ChemicalsID] AND session。[FixerID] = chemicals。[ChemicalsID]

删除该行会返回正确的1个条目。

Answer 1

也许你想/需要一些外连接？
您在使用Oracle吗？一旦我在JOIN中遇到一个奇怪的OR子句问题 - 它工作不正确 - abybody知道为什么......通过将JOIN（我更喜欢）转换为WHERE子句来实现实验

注意：OR和LIKE是非常昂贵的操作

SQL搜索 - 第二部分

1 个答案: