Question

我写了下面的临时表来设置总和查询的情况。

Total_count_package_5_15和total_count_package_5_13都返回空值。（他们不应该）。数据已在前面的临时表中正确设置，并且我已确认数据已在预期的位置。

create temporary table screening_packages_count_2018 as

select screening_screen_date,
       count(case when screening_package = 1 then 1 end) as count_package_1,
       count(case when screening_package = 2 then 1 end) as count_package_2,
       count(case when screening_package = 3 then 1 end) as count_package_3,
       count(case when screening_package = 4 then 1 end) as count_package_4

from prod.leasing_fact

where date_part(year, screening_screen_date) = 2018

group by screening_screen_date

order by 1;


-- 5 AND 6 PACKAGE TOTALS BASED ON 2018 1-4 COUNTS

    select date_trunc('day', screening_screen_date)                                              as day,
           case
               when (sum(count_package_1) + sum(count_package_2) + sum(count_package_3) <= 75)
                   then (sum(count_package_1) + sum(count_package_2) + sum(count_package_3)) end as total_count_package_5_15,

           case
               when ((sum(count_package_1) + sum(count_package_2) + sum(count_package_3)) >= 76 and
                     (sum(count_package_1) + sum(count_package_2) + sum(count_package_3)) <= 150)
                   then (sum(count_package_1) + sum(count_package_2) + sum(count_package_3)) end as total_count_package_5_13,

           0                                                                                     as total_count_package_6

    from screening_packages_count_2018

    where count_package_4 = 0
    group by day

我相信使用sums时case语句中有错误，但是我不确定这是怎么回事。谢谢！

Answer 1

尝试此操作...将ELSE 0的{{1}}放在第一个Select中。如果有任何Count() function值，则不能为NULL值。

SUM NULL

总和返回空值的情况

1 个答案: