[英]How do I convert mysql query to django model's ORM?
這是我的mysql查詢。
SELECT DeviceUID, Max(LogTime) , count(DeviceUID), Mode
FROM P2PLog.ConnectResult_Table group by DeviceUID;
如何將此代碼轉換為ORM?
我嘗試這個orm。 我需要選擇Max(LogTime)
作為列。 我該怎么辦?
>>> ct = ConnectresultTable.objects
>>> aaa = ct.values('deviceuid', 'mode').annotate(items=Count('deviceuid'))
>>> print aaa.query
SELECT `ConnectResult_Table`.`DeviceUID`, `ConnectResult_Table`.`Mode`, COUNT(`C
onnectResult_Table`.`DeviceUID`) AS `items` FROM `ConnectResult_Table` GROUP BY
`ConnectResult_Table`.`DeviceUID`, `ConnectResult_Table`.`Mode` ORDER BY NULL
我終於自己得到了答案。 感謝大家!
>>> ct = ConnectresultTable.objects
>>> aaa = p2p_ct.values('deviceuid', 'mode').annotate(items=Count('deviceuid'),
new_status=Max('logtime'))
>>> print aaa.query
SELECT `ConnectResult_Table`.`DeviceUID`, `ConnectResult_Table`.`Mode`, COUNT(`C
onnectResult_Table`.`DeviceUID`) AS `items`, MAX(`ConnectResult_Table`.`LogTime`
) AS `new_status` FROM `ConnectResult_Table` GROUP BY `ConnectResult_Table`.`Dev
iceUID`, `ConnectResult_Table`.`Mode` ORDER BY NULL
$ python manage.py inspectdb
運行此命令!
$ python manage.py inspectdb > models.py Save your file using Unix.
class Person(models.Model):
id = models.IntegerField(primary_key=True)
first_name = models.CharField(max_length=70)
class Meta:
managed = False
db_table = 'CENSUS_PERSONS' ( Create unmanaged modes, managed=false)
$ python manage.py migrate ( And install this)
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.