相关疑难解决方法(0)

嗨，我正在尝试插入一个具有datetimeIndex索引的数据框。

这是数据

res = pd.DataFrame(cursor.execute("SELECT DATETIME,VALUE FROM {} WHERE DATETIME > ? AND DATETIME < ?".format(table),[start,end]).fetchall(),columns=['date','value'])
res.set_index('date',inplace=True)

产生

2013-01-31 00:00:00   517  
2012-12-31 00:00:00   263  
2012-11-30 00:00:00  1917  
2012-10-31 00:00:00   391  
2012-09-30 00:00:00   782  
2012-08-31 00:00:00   700  
2012-07-31 00:00:00   799  
2012-06-30 00:00:00   914  
2012-05-31 00:00:00   141  
2012-04-30 00:00:00   342  
2012-03-31 00:00:00   199  
2012-02-29 00:00:00   533  
2012-01-31 00:00:00  1393  
2011-12-31 00:00:00   497  
2011-11-30 00:00:00  1457  
2011-10-31 00:00:00   997  
2011-09-30 00:00:00   533  
2011-08-31 00:00:00   626  
2011-07-31 00:00:00  1933  
2011-06-30 00:00:00  4248  
2011-05-31 00:00:00 …