sum 列中的 mySQL Sum

Question

      SELECT tbl_trans.trans_username,
    Sum(Case When tbl_trans.trans_type <> 'REWARD' AND tbl_trans.trans_winlose <> 'QB' then
         trans_winloseamount Else 0 End) BETHOST,
    Sum(Case When tbl_trans.trans_winlose = 'QB'  then
         trans_winloseamount Else 0 End) QB, 
     Sum(Case When tbl_trans.trans_type = 'REWARD'  then
         trans_winloseamount Else 0 End) reward ,
         Sum(sum(BETHOST)+sum(QB)+sum(reward)) totalsum
 FROM tbl_trans 
 GROUP BY trans_username

我需要 BETHOST、QB 和奖励的总和
如何求和这个Sum(sum(BETHOST)+sum(QB)+sum(reward)) totalsum

Answer 1

请试试这个

sum(SELECT(BETHOST))+sum(SELECT(QB))+sum(SELECT(reward)) AS totalsum