Simple JOIN on three tables

[spacemarc]

Hi
I have 3 tables with the same fields.
 	
I would want to find the data that they are comprised in the time interval:

SELECT a.*, b.*, c.*
FROM tab1 a, tab2 b, tab3 c
WHERE a.date between 'YYYY-MM-DD' and 'YYYY-MM-DD'
OR b.date between 'YYYY-MM-DD' and 'YYYY-MM-DD'
OR c.date between 'YYYY-MM-DD' and 'YYYY-MM-DD'
ORDER BY a.date DESC

But this query returns all the fields duplicated.
Where it is mistaken?

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