mysql - Mysql更新查询与选择连接

Question

我正在尝试使用其中的 select 运行 mysql 更新查询，但出现错误。查询是这样的：

UPDATE keywords_stats_google_temp SET (Impressions_chg, Clicks_chg, AveragePosition_chg, Ctr_chg, AverageCpc_chg, CurrentMaxCpc_chg, FreeJoins_chg, PaidJoins_chg) = (SELECT 
                SUM(Impressions) AS Impressions,
                SUM(Clicks) AS Clicks,
                SUM(Impressions*AveragePosition)/SUM(Impressions) AS AveragePosition,
                (SUM(Clicks)*revenue_price)/SUM(Impressions) AS Ctr,
                SUM(Spend)/SUM(Clicks) AS AverageCpc,
                CurrentMaxCpc,
                SUM(free_joins) AS FreeJoins,
                SUM(paid_joins) AS PaidJoins
                FROM (SELECT KeywordId FROM keywords_stats_google_temp) a JOIN keywords_stats_google_naughtymeetings b ON b.KeywordId = a.KeywordId WHERE b.TimePeriod >= '2012-04-01 00:00:00'
                AND b.TimePeriod <= '2012-04-23 00:00:00' GROUP BY a.KeywordId, MatchType) 

但我只收到“#1064 - 您的 SQL 语法有错误；请查看与您的 MySQL 服务器版本相对应的手册，以了解在 '(Impressions_chg, Clicks_chg, AveragePosition_chg, Ctr_chg, AverageCpc_chg, Curr' 附近使用的正确语法在第 1 行"

有人可以帮我吗？

谢谢！

Answer 1

你不能SET (a,b) = (value_a, value_b)在 MySQL 中拥有。

重写查询。像这样的东西：

UPDATE 
    keywords_stats_google_temp AS u
  JOIN
    ( SELECT 
          SUM(Impressions) AS Impressions,
          SUM(Clicks) AS Clicks,
          SUM(Impressions*AveragePosition)/SUM(Impressions) AS AveragePosition,
          (SUM(Clicks)*revenue_price) / SUM(Impressions) AS Ctr,
          SUM(Spend)/SUM(Clicks) AS AverageCpc,
          CurrentMaxCpc,
          SUM(free_joins) AS FreeJoins,
          SUM(paid_joins) AS PaidJoins
      FROM keywords_stats_google_naughtymeetings AS b  
      WHERE b.TimePeriod >= '2012-04-01 00:00:00'
        AND b.TimePeriod <= '2012-04-23 00:00:00' 
      GROUP BY KeywordId, 
               MatchType
    ) AS tmp
        ON  tmp.KeywordId = u.KeywordId 
        AND tmp.MatchType = u.MatchType
SET 
  u.Impressions_chg     = tmp.Impressions, 
  u.Clicks_chg          = tmp.Clicks, 
  u.AveragePosition_chg = tmp.AveragePosition, 
  u.Ctr_chg             = tmp.Ctr,
  u.AverageCpc_chg      = tmp.AverageCpc, 
  u.CurrentMaxCpc_chg   = tmp.CurrentMaxCpc, 
  u.FreeJoins_chg       = tmp.FreeJoins, 
  u.PaidJoins_chg       = tmp.PaidJoins ;