# 獲取個數
     
    models.Tb1.objects.filter(name='seven').count()

    # 大於，小於
 
    models.Tb1.objects.filter(id__gt=1)              # 獲取id大於1的值
    models.Tb1.objects.filter(id__lt=10)             # 獲取id小於10的值
    models.Tb1.objects.filter(id__lt=10, id__gt=1)   # 獲取id大於1 且 小於10的值

    # in
    
    models.Tb1.objects.filter(id__in=[11
 
, 22, 33])   # 獲取id等於11、22、33的資料
    models.Tb1.objects.exclude(id__in=[11, 22, 33])  # not in

    # contains
   
    models.Tb1.objects.filter(name__contains="ven")
    models.Tb1.objects.filter(name__icontains="ven") # icontains大小寫不敏感
    models.Tb1.objects.exclude(name__icontains="ven")

    # range
 

   
    models.Tb1.objects.filter(id__range=[1, 2])   # 範圍bettwen and

    # 其他類似
   
    startswith，istartswith, endswith, iendswith,

    # order by
  
    models.Tb1.objects.filter(name='seven').order_by('id')    # asc
    models.Tb1.objects.filter(name='seven').order_by('-id')   # desc

    # limit 、offset
 

   
    models.Tb1.objects.all()[10:20]

    # group by
    from django.db.models import Count, Min, Max, Sum
    models.Tb1.objects.filter(c1=1).values('id').annotate(c=Count('num'))
    SELECT "app01_tb1"."id", COUNT("app01_tb1"."num") AS "c" FROM "app01_tb1"WHERE "app01_tb1"."c1" = 1 GROUP BY "app01_tb1"."id"