[英]case when sums returning null values
I've written the following temp table to set up for a case when sum query. 我编写了以下临时表来设置总和查询的情况。
Total_count_package_5_15 and total_count_package_5_13 are both returning null values. Total_count_package_5_15和total_count_package_5_13都返回空值。 (They shouldn't be). (他们不应该)。 The data is properly set up in the preceding temporary table and I've confirmed that the data is there as expected. 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
I believe that there is an error in my case statement when using sums, but I'm not sure what is going on here. 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。 Thanks! 谢谢!
Try this... Put an ELSE 0
in the first Select
for each Count() function
. 尝试此操作...为每个Count() function
的第一个Select
放置一个ELSE 0
。 If there are any NULL
values, you can't SUM NULL
values. 如果有任何NULL
值,则不能对SUM NULL
值SUM NULL
。
create temporary table screening_packages_count_2018 as
select screening_screen_date,
count(case when screening_package = 1 then 1 ELSE 0 end) as count_package_1,
count(case when screening_package = 2 then 1 ELSE 0 end) as count_package_2,
count(case when screening_package = 3 then 1 ELSE 0 end) as count_package_3,
count(case when screening_package = 4 then 1 ELSE 0 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
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