mysql從同一表加入總和

Question

這是我的桌子：

我正在嘗試列出收入最高的用戶列表（TOP列表）。 我是用SUM（收益）和GROUP BY的用戶名 ，但我想總結的upline_earnings了。

在上表中user1是test的上線，因此來自test的所有收入都應計為user1的收入。

這是我的代碼：

SELECT COUNT (a.id) as total,
             (SUM(CASE WHEN b.upline=a.username THEN b.up_earnings ELSE 0 END)+SUM(a.earnings)) as tot_earnings,
             SUM(a.dls) as tot_dls,
             a.username
FROM logs a left join logs b ON a.username=b.upline
GROUP BY a.username ORDER BY tot_earnings DESC

但這不起作用！ 看起來表A的結果將被復制： http : //i.stack.imgur.com/Mefht.png

歡迎任何幫助！

謝謝！

Answer 1

我想你想通過匯總表username做之前join 。 如果我了解您要執行的操作，則可能是以下查詢：

SELECT l.username, count(*) as total_uplines,
       coalesce(sum(b.up_earnings), 0) + l.earnings as tot_earnings,
       l.tot_dls
FROM (select l.username, sum(l.earnings) as earnings,
             sum(l.dls) as tot_dls
      from logs l
      group by l.username
     ) l left join
     logs b
     ON l.username = b.upline
GROUP BY l.username, l.earnings, l.tot_dls
ORDER BY tot_earnings DESC;