MySQL join not returning all results

SELECT * FROM products AS p JOIN images AS i ON (p.id = i.product_id)

I want this query also to return results where t开发者_开发技巧here are no fields in "images" related to "products". How do I do that?

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You need an OUTER join.

SELECT *
FROM   products AS p
       LEFT JOIN images AS i
         ON ( p.id = i.product_id )  

LEFT because you want to preserve all rows from the left (first) table.

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You will need to use LEFT JOIN:

   SELECT * FROM 
      products AS p LEFT JOIN images AS i ON p.id = i.product_id;