查询无效

问题描述：

我的查询是

my query is

select university_info.university_name from university_info where not exists(SELECT
 state_visit_info.organization_id, university_info.university_name ,university_info.university_id FROM university_info INNER JOIN
state_visit_info ON university_info.university_id = state_visit_info.university_id INNER JOIN
country_info ON state_visit_info.country_code = country_info.country_code where
state_visit_info.organization_id='01')

它无法正常工作

its not working

答

我们无能为力，即使你提出了一个实际问题：解决这个需要仔细查看，完成实际数据你正在使用来检索。没有数据 - 并且对你期望选择的内容有所了解 - 没有人可以做任何事情。

所以，这取决于你。

打开SSMS，选择你的数据库并开始一个新查询。

复制并粘贴它，然后执行它。

看看你得到了什么。这是你期望的吗？没有？所以砍掉外面的东西（ SELECT ... WHERE NOT EXISTS 部分）并再次运行它。

你得到了什么？你期待什么？没有？所以砍掉一些并继续直到你这样做。然后稍稍退一步，看看它有什么效果。

对不起，但我们不能为你做到这一点。

There is nothing we can do with that, even if you included an actual question: solving this needs careful looking, complete with the actual data you are using to retrieve from. Without the data - and a good idea of what you expect to select - nobody can do anything much.

So, it's up to you.
Open SSMS, select your DB and start a new query.
Copy and paste it in, and execute it.
Look at what you do get. Is it what you expect? No? So chop out the outside stuff ( the SELECT...WHERE NOT EXISTS portion) and run it again.
What do you get? What you expected? No? So chop out some more and continue until you do. Then put a bit back, and see what effect it has.

Sorry, but we can't do that for you.

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