Hi, You will have to provide more information in order to receive a meaningful response, what exactly do your tables llok like? Without seeing your table structure I would guess that you could use a NOT IN query, ie. select tripid from yourtable where tripid not in(select tripid from tb1) and tripid not in(select tripid from tb2) and tripid not in(select tripid from tb3) etc..
I will try and help further if you give more information.
Regards,
Rob
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