Limit 1 after filter in django

SystemsV2.objects.filter(Q(sysname = 'DC_BW_SBX_S4H') | Q(sysname='DC_BW_DEV_S4H')).values('sysname')

Executing the above command gives this output,

<QuerySet [{'sysname': 'DC_BW_SBX_S4H'}, {'sysname': 'DC_BW_SBX_S4H'}, {'sysname': 'DC_BW_DEV_S4H'}]>

How can we make it so that only one of each exists in the result. For example,

<QuerySet [{'sysname': 'DC_BW_SBX_S4H'}, {'sysname': 'DC_BW_DEV_S4H'}]>

>Solution :

Use .distinct()

SystemsV2.objects.filter(Q(sysname = 'DC_BW_SBX_S4H') | Q(sysname='DC_BW_DEV_S4H')).values('sysname')\
    .order_by('sysname').distinct()