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I want to ask what exactly happens to the following Explain_Plan table : enter image description here

It firsts Joins the two tables Products & Order_Items then the output is joined with Orders and then with the Customers.Am I right?if no please explain me, thank you very much.

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You're right, just missed the toplevel sort. – Mat Dec 12 '13 at 7:09
    
Thank you very much also one more question to make me sure,the Orders are firstly joined with the output of Products & Order_Items and then with Customers as described or that Orders is joined with Customers and this output is joined with the output of Products & Order_Items? – Phil_Charly Dec 12 '13 at 7:23

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