SQL查詢每一個用戶首次購買商品

goods表以下：   name time product A 2016-1-2 WFEY B 2016-2-17 ASG A 2017-1-10 SGH C 2015-4-5 HRT C 2016-7-12 XCC A 2017-3-4 ESFW     SELECT g.name,g.product FROM goods g INNER JOIN (SELECT MIN(time) AS t

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