select statement in another select

[Eduardo Azevedo <dudu010@xxxxxxxxx>]

Hi,
I tried an SQL code that uses a select statement
inside another but I got null as a result. I tried the
same code with the same tables in other database
engines and it worked fine. What is wrong?

My code is like that:
select * from tableOne
where fieldOne IN (select fieldTwo from tableTwo)

Eduardo

                     

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