Python 如何将SQL查询转换为Django ORM？

这是我想更改为Django ORM的SQL查询，请帮助

你可以。

        select 0 'bucket_id', 'Incomplete' as 'name', count(*) 'user_count'
        from user_smartreq where job_id = {job_id} and pred_perf is null
        union
        select 1 'bucket_id', 'Very Poor' as 'name', count(*) 'user_count'
        from user_smartreq where job_id = {job_id} and pred_perf between 0 and 1.999
        union
        select 2 'bucket_id', 'Poor'      as 'name', count(*) 'user_count'
        from user_smartreq where job_id = {job_id} and pred_perf between 2 and 2.999
        union
        select 3 'bucket_id', 'OK'        as 'name', count(*) 'user_count'
        from user_smartreq where job_id = {job_id} and pred_perf between 3 and 3.999
        union
        select 4 'bucket_id', 'Good'      as 'name', count(*) 'user_count'
        from user_smartreq where job_id = {job_id} and pred_perf between 4 and 4.599
        union
        select 5 'bucket_id', 'Great'     as 'name', count(*) 'user_count'
        from user_smartreq where job_id = {job_id} and pred_perf between 4.599 and 5