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SUM and Addition of Null


SUM and Addition of Null

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iBar
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Comments posted to this topic are about the item SUM and Addition of Null
Raghavendra Mudugal
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:-) Simply Nice.

(note: aliasing the columns in the first select statement will be enough)

ww; Raghu
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angad.singh88
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Really Nice !

Simple and Best. Smile

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Nice question to start week with +1 Smile

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Koen Verbeeck
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Easy one for the Monday :-D
Especially easy because the way the answers were structured, you only had to calculate the last column :-)


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Excellent question, thanks very much. Have a good week.

---

Note to developers:
CAST(SUBSTRING(CAST(FLOOR(NULLIF(ISNULL(COALESCE(1,NULL),NULL),NULL)) AS CHAR(1)),1,1) AS INT) == 1
So why complicate your code AND MAKE MY JOB HARDER??!Crazy

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Nice & Easy one..

Thanks
Carlo Romagnano
Carlo Romagnano
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Remember that SUM may return NULL, so SUM(num1)+SUM(num2) may lead to NULL:
select 
sum(num1) AS S1,
sum(num2) AS S2,
sum(num1) + sum(num2) AS S3,
sum(num1 + num2) AS S4
from
(
select cast('1' as int) as num1, cast(NULL as int) as num2
union all
select '1' as num1, NULL as num2
union all
select '1' as num1, NULL as num2
union all
select NULL as num1, NULL as num2
) as t


The above select return 3,NULL,NULL,NULL

I run on tuttopodismo
Stuart Davies
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Thanks for an easy start to the week

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kapil_kk
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good one Carlo

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