@ सर्जियोमिशेल्स का जवाब सही होना चाहिए। लेकिन इसे विक्रेता का नाम नहीं मिलता है, और यह सिंटैक्स का उपयोग करता है जिसे (मेरी राय में) टाला जाना चाहिए।
तो, यहाँ एक विकल्प है...
SELECT
buyer.name AS buyer,
buyerWants.name AS buyer_wants, (assuming the items have names),
buyerHas.name AS buyer_has,
seller.name AS seller,
sellerWants.name AS seller_wants,
sellerHas.name AS seller_has
FROM
People AS buyer
INNER JOIN
Wishlist AS buyerWants
ON buyerWants.person_id = buyer.person_id
INNER JOIN
Giveaways AS sellerHas
ON sellerHas.item_id = buyerwish.item_id
INNER JOIN
People AS seller
ON seller.person_id = sellerHas.seller_id
INNER JOIN
WishList AS sellerWants
ON sellerWants.person_id = seller.person_id
INNER JOIN
GiveAways AS buyerHas
ON buyerHas.item_id = sellerWants.item_id
AND buyerHas.person_id = buyer.person_id
WHERE
buyer.person_id = ?
