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Home 2017 October SQL Puzzle: SQL Advance Query – Find number of days of the Month of any date

SQL Puzzle: SQL Advance Query – Find number of days of the Month of any date

This article is half-done without your Comment! *** Please share your thoughts via Comment ***

Check the below input date and expected output to find the total number of days in the month of given date.

Input Date Date:

1
'2017-08-08'

Expected Output:

1
2
3
NumberOfDays
------------
31

Solution:

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DECLARE @InputDate DATE = '2017-08-08'
 
SELECT
CASE
WHEN MONTH(@InputDate) IN (1, 3, 5, 7, 8, 10, 12) THEN 31
WHEN MONTH(@InputDate) IN (4, 6, 9, 11) THEN 30
ELSE
CASE WHEN (YEAR(@InputDate) % 4 = 0 AND
YEAR(@InputDate) % 100 != 0) OR
(YEAR(@InputDate) % 400 = 0)
THEN 29
ELSE 28
END
END AS NumberOfDays

Please try the different solution for this puzzle and share it via comment...

Oct 12, 2017Anvesh Patel
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Comments: 4
  1. Dinesh.IS
    October 13, 2017 at 9:59 am

    DECLARE @InputDate DateTime = ‘2017-5-1’
    Select DateDiff(Day,@InputDate-Day(@InPutDate),DateAdd(Month,1,@InPutDate)-Day(@InputDate)) As NumberOfDays

    ReplyCancel
  2. OM SHAKYA
    November 16, 2017 at 3:20 am

    DECLARE @InputDate DATE = ‘2020-02-01’
    ,@FirstDate DATE
    ,@LastDate DATE

    SELECT @FirstDate = EOMONTH(@InputDate)
    SELECT @LastDate = DATEADD(mm, DATEDIFF(mm, 0, @InputDate), 0)
    SELECT DATEDIFF(DAY, @LastDate, @FirstDate) + 1 AS NoOfDaysInMonth

    ReplyCancel
  3. Ram
    August 17, 2018 at 5:47 pm

    DECLARE @InputDate DateTime = ‘2018-06-17’
    DECLARE @FirstDate DateTime
    select Day(@InPutDate)
    Set @FirstDate = @InputDate-Day(@InPutDate)
    select DATEDIFF(Day,@FirstDate,EOMonth(@InputDate))

    ReplyCancel
  4. serg
    December 25, 2019 at 9:49 pm

    declare @d as date
    set @d=’2017-8-08′

    select day(EOMONTH(@d))

    ReplyCancel

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Anvesh Patel
Anvesh Patel

Database Engineer

October 12, 2017 4 Comments SQL PuzzleAnvesh Patel, database, database research and development, dbrnd, SQL Advance Query, SQL Interview, SQL Problem, SQL Programming, SQL Puzzle, SQL Query, SQL Tips and Tricks
About Me!

I'm Anvesh Patel, a Database Engineer certified by Oracle and IBM. I'm working as a Database Architect, Database Optimizer, Database Administrator, Database Developer. Providing the best articles and solutions for different problems in the best manner through my blogs is my passion. I have more than six years of experience with various RDBMS products like MSSQL Server, PostgreSQL, MySQL, Greenplum and currently learning and doing research on BIGData and NoSQL technology. -- Hyderabad, India.

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