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SQL Query (Do all businesses have computers?)

November 28, 2012 at 09:01:06
Specs: Windows 7

How do I make a SQL query like

"Do all businesses have computers?"

There is a business_ID in business table
and computer_ID in computer table,
but I don't know how to make the SQL query for them.



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#1
November 28, 2012 at 09:30:43

I've given you a hint about one part of your homework. Now I think it's time that you did your own research.

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