Oracle JOIN USING +子查询:ora-00904字符串:无效的标识符 [英] Oracle JOIN USING + Subquery : ora-00904 string: invalid identifier

问题描述

我的查询中有一个小语法问题(简体):

i m having a little syntax problem in my query (simplified) :

select *
from table1 t1
inner join table2 t2 using (pk1)
inner join table3 t3 using (pk2)
where not exists (select1 from table4 t4 where t4.pk1 = t1.pk1)

通过使用"using"关键字，oracle不允许在列名前面使用表标识符(例如:t1.pk1，只能使用pk1)

By using the "using" keyword, oracle doesnt allow table identifier in front of the column name (eg : t1.pk1, only pk1 can be used)

如果我写:

select *
from table1 t1
inner join table2 t2 using (pk1)
inner join table3 t3 using (pk2)
where not exists (select1 from table4 t4 where t4.pk1 = pk1)

此查询不会给出预期的结果.

This query will not give the expected results.

但是，由于我使用的是存在"子查询，因此如何加入该子查询?

But since i am using an "exists" subquery, how can i join this subquery ?

当然，我想我可以用另一种方式编写此查询并避免存在该查询，或者我不能使用"using".

Of course, i suppose i could write this query another way and avoid the exists, or i could NOT use "using".

但是在where子句中是否可以将"join/using"与子查询结合使用?

But is it possible to have "join / using" combined with a subquery in the where clause ?

使用Oracle 10gR2

Edit : using Oracle 10gR2

推荐答案

有趣的问题！在仍然使用USING的情况下，我能管理的最好的方法是:

Interesting problem! The best I can manage while still using USING is:

select * from
( select *
  from table1 t1
  inner join table2 t2 using (pk1)
  inner join table3 t3 using (pk2)
) v
where not exists (select1 from table4 t4 where t4.pk1 = v.pk1)

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