anyone know how to do a join where the data can be different

I have two different data sets. They come from two different feeds. I have an ID field that I can join on that is the same in both. However, I have a date field in each. Here is the catch, the dates can be up to 5 second apart.

So I have

select <col>
from tab1, tab2
where tab1.id = tab2.id
and tab1.datefield is with in 5 seconds of tab2.datefield

anyone know a way to do this without a lot of complex pl/sql?

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