How do I sum days with records in SQL ?

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Hello,

I have SQL Table with articles with dates inside, and I want to check how many days in month are with records?

For example: In January 2019 I have only 15 days with records the rest not and then in February 2019 I have a few other but not full February, so how can see the total number of days with records on each month of the year.

What I have tried:

  select day(Date) as 'Day', count(*) as 'number of days',
	   CONVERT(char(7), date, 120) As [year]
from [dbo].[Expenses]
where Day(date) is not null
group by day(Date),CONVERT(char(7), date, 120)

This is something that I tried but I don't get the right numbers.
Thankfully

Posted 18-Jul-20 7:35am

Member 13410460

Updated 18-Jul-20 23:51pm

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Richard MacCutchan 19-Jul-20 4:36am

The logical answer is to select all records for a specific month and then count the number of unique days in the set. And why would you have records with the day value as null?

Member 13410460 19-Jul-20 8:07am

Hi, Thank you for your answer, I need to count only the days that I have bought something.

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#realJSOP · Accepted Answer · 2020-07-18T23:51:00

Solution 1

Try this:

SQL

SELECT DATENAME(MONTH, MONTH([Date])) AS ForMonth
       ,COUNT(*) AS NumberOfDays
       ,YEAR([Date]) AS ForYear
FROM   [dbo].[Expenses]
where  [Date] IS NOT NULL
GROUP BY YEAR([Date]), MONTH([Date]);

Posted 18-Jul-20 23:51pm

#realJSOP

Updated 19-Jul-20 2:07am

v4

Comments

Member 13410460 19-Jul-20 8:04am

Hi, Thank you for your answer, I tried the code and it says that the 'Datename function requires 2 arguments'

#realJSOP 19-Jul-20 8:06am

My immediate answer is to be a programmer, learn how to use google, and fix it. Seriously, man...

I fixed the code.

Member 13410460 19-Jul-20 8:08am

haha, I just replied to the results of YOUR code, that's all. But thank you

Member 13410460 19-Jul-20 10:31am

The latest code is the one that gives me the number of days only in January, in the last code you only had to put the DATENAME(month,[Date]) in GROUP BY and it would be correct one, so please do it like this :
SELECT DATENAME(MONTH,[Date]) AS ForMonth
,COUNT(*) AS NumberOfDays
,YEAR([Date]) AS ForYearGR

FROM [dbo].[Expenses]
where [Date] IS NOT NULL
GROUP BY YEAR([Date]), MONTH([Date]), Datename(MOnth,[Date])

So it would match the question.

Thank you a lot , you helped me. !