Question

问题：从基因阅读的第一个日期开始，直到会员被取消为止的每月成员数量。

会员每月可以阅读多次。他们可以继续拥有他们想要的尽可能多的读数。

示例：

member_id    date       gene_a_measurement_done    gene_b_measurement_done
5557153     1/1/2010    y                      
5557153     2/1/2010                                y
222458      2/1/2010    y                           y
222458      1/1/2011                                y
707222      1/1/2011    y

另一张表有成员取消日期：

member_id    status      date    
5557153     Cancelled    5/1/2011           
222458      Cancelled    12/1/9999      
707222     Cancelled     12/1/9999

预期结果：

month    distinct_count_of_member_with_gene_a_measurement      distinct_count_of_member_with_gene_b_measurement    
1/1/10              1                                       0
2/1/10              2                                       2
3/1/10              2                                       2
4/1/10              2                                       2
5/1/10              1                                       1
6/1/10              1                                       1
7/1/10              1                                       1
8/1/10              1                                       1
9/1/10              1                                       1
10/1/10             1                                       1
11/1/10             1                                       1
12/1/10             1                                       1
1/1/11              2                                       1

查询已尝试：

SELECT 
    sub.last_day,
    sum(sub.distinct_count_of_member_with_gene_a_measurement) as distinct_count_of_member_with_gene_a_measurement,
    sum(sub.distinct_count_of_member_with_gene_b_measurement) as distinct_count_of_member_with_gene_b_measurement,
FROM 
    (SELECT last_day(date),
            COUNT(DISTINCT member_id) as distinct_count_of_member_with_gene_a_measurement,
            null as distinct_count_of_member_with_gene_b_measurement,
    FROM  measurement
    WHERE gene_a_measurement_done is not null
    GROUP BY    last_day(date)
    UNION ALL
    SELECT  last_day(date),
            null as distinct_count_of_member_with_gene_a_measurement,
            COUNT(DISTINCT member_id) as distinct_count_of_member_with_gene_b_measurement,
    FROM  measurement
    WHERE gene_b_measurement_done is not null
    GROUP BY    last_day(date)) as sub
GROUP BY    sub.last_day(date)

以上查询仅提供了完成测量的月份的不同成员计数，我不确定如何最好地考虑取消日期？（在member_id上使用member_status表进行内部联接并且有条件过滤掉已取消的成员？）

查找从开始日期到成员取消的每个月的每月计数

0 个答案: