stringsql=$@"SELECT DATE_FORMAT(CreateDate,'%Y-%m-%d') CreateDate,SUM(Time) Time FROM rb_goods_wk_studytime WHERE UserId = {userId} AND CreateDate >='{startTime}' AND CreateDate <= '{endTime} 23:59:59'
GROUP BY DATE_FORMAT(CreateDate,'%Y-%m-%d') ORDER BY DATE_FORMAT(CreateDate,'%Y-%m-%d')";
stringsql=$@"SELECT DATE_FORMAT(CreateDate,'%Y-%m-%d') CreateDate,SUM(Time) Time FROM rb_goods_wk_studytime WHERE UserId = {userId} AND CreateDate >='{time}' AND CreateDate <= '{time} 23:59:59'
GROUP BY DATE_FORMAT(CreateDate,'%Y-%m-%d') ORDER BY DATE_FORMAT(CreateDate,'%Y-%m-%d')";