我有一个模型如下:
class call_log(models.Model):
call_from = models.CharField(max_length=200)
call_to = models.CharField(max_length=200)
direction = models.CharField(max_length=200)
end_time = models.CharField(max_length=200)
duration = models.CharField(max_length=200)
total = models.DecimalField(max_digits=8, decimal_places=5, blank=True, default=0)
rate = models.DecimalField(max_digits=8, decimal_places=5, blank=True, default=0)
它记录了由(不同)号码和 sip 端点进行的每个单独呼叫。
我要运行的 SQL 查询是:
SELECT DISTINCT(call_from) AS start, sum(total) AS total
FROM polls_call_log GROUP BY start;
我如何在 / for django 中写这个?