SELECT [Item].[item_id], [Item].[picture], [Item].[title], [Item].[description], [Item].[seller_id], [Item].[current_price], [Item].[increment]
FROM [Item]

INNER JOIN [Keyword]
ON [Keyword].[item_id] = [Item].[item_id]

WHERE [Keyword].[keyword] LIKE '%' + ? + '%'
GROUP BY [Item].[item_id]