mysql query with join

this is my database:

I would retrieve all records in richiestepreventivo where idImpres开发者_如何学Goa==xx and all the data in privati where privati.id==richiestepreventivo.idPrivato. Can you explain me how I have to set the query with join?

Thanks.

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SELECT *
FROM privati AS p
INNER JOIN richiestepreventivo AS r
      ON p.id = r.idPrivato
WHERE r.idImpresa = xx

Are you asking for a simple inner join

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SELECT r.id, p.data 
FROM richiestepreventivo r 
JOIN privati p ON p.id = r.idPrivato 
WHERE r.id = XX;