误差-> Expression #29 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'sephecom_ecom.v2.secondary_colors' which is not functionally dependent on columns in GROUP BY clause; this is incompatiblewith sql_mode=only_full_group_by
我想在R中编写一个for循环来替换数据帧中某一列的NA值,并在两个条件为真时将它们替换为同一列的值的平均值。当条件满足时,我想使用来自同一年和同一组的观察结果将平均值分配给NAs。我写了以下代码,但我正在努力编写条件。missing <- which(is.na(df$price)) x <- df[missing,]group se
下面是一个不工作查询的示例:FROM reload rON r.useID= v.`userID` AND r.scooterID= v.scooterID WHERE r.`scooterID ` IS NOT NULL示例:
如果用户X使用滑板车A、B和重新加载滑板车A,B.我的查询应该返回用户X的userID。