SQL Select Upcoming Birthdays

Question

I'm trying to write a stored procedure to select employees who have birthdays that are upcoming.

SELECT * FROM Employees WHERE Birthday > @Today AND Birthday < @Today + @NumDays

This will not work because the birth year is part of Birthday, so if my birthday was '09-18-1983' that will not fall between '09-18-2008' and '09-25-2008'.

Is there a way to ignore the year portion of date fields and just compare month/days?

This will be run every monday morning to alert managers of birthdays upcoming, so it possibly will span new years.

Here is the working solution that I ended up creating, thanks Kogus.

SELECT * FROM Employees 
WHERE Cast(DATEDIFF(dd, birthdt, getDate()) / 365.25 as int)
    - Cast(DATEDIFF(dd, birthdt, futureDate) / 365.25 as int) 
<> 0

Answer 1

Note: I've edited this to fix what I believe was a significant bug. The currently posted version works for me.

This should work after you modify the field and table names to correspond to your database.

SELECT 
  BRTHDATE AS BIRTHDAY
 ,FLOOR(DATEDIFF(dd,EMP.BRTHDATE,GETDATE()) / 365.25) AS AGE_NOW
 ,FLOOR(DATEDIFF(dd,EMP.BRTHDATE,GETDATE()+7) / 365.25) AS AGE_ONE_WEEK_FROM_NOW
FROM 
  "Database name".dbo.EMPLOYEES EMP
WHERE 1 = (FLOOR(DATEDIFF(dd,EMP.BRTHDATE,GETDATE()+7) / 365.25))
          -
          (FLOOR(DATEDIFF(dd,EMP.BRTHDATE,GETDATE()) / 365.25))

Basically, it gets the # of days from their birthday to now, and divides that by 365 (to avoid rounding issues that come up when you convert directly to years).

Then it gets the # of days from their birthday to a week from now, and divides that by 365 to get their age a week from now.

If their birthday is within a week, then the difference between those two values will be 1. So it returns all of those records.

Answer 2

In case someone is still looking for a solution in MySQL (slightly different commands), here's the query:

SELECT
 name,birthday,
 FLOOR(DATEDIFF(DATE(NOW()),birthday) / 365.25) AS age_now,
 FLOOR(DATEDIFF(DATE_ADD(DATE(NOW()),INTERVAL 30 DAY),birthday) / 365.25) AS age_future

FROM user

WHERE 1 = (FLOOR(DATEDIFF(DATE_ADD(DATE(NOW()),INTERVAL 30 DAY),birthday) / 365.25)) - (FLOOR(DATEDIFF(DATE(NOW()),birthday) / 365.25))

ORDER BY MONTH(birthday),DAY(birthday)

Answer 3

Best use of datediff and dateadd. No rounding, no approximates, no 29th of february bug, nothing but date functions

1. ageOfThePerson = DATEDIFF(yyyy,dateOfBirth, GETDATE())

2. dateOfNextBirthday = DATEADD(yyyy,ageOfThePerson + 1, dateOfBirth)

3. daysBeforeBirthday = DATEDIFF(d,GETDATE(), dateofNextBirthday)

Thanks to @Gustavo Cardoso, new definition for the age of the person

1. ageOfThePerson = FLOOR(DATEDIFF(d,dateOfBirth, GETDATE())/365.25)

Answer 4

Liked the approach of @strelc, but his sql was a bit off. Here's an updated version that works well and is simple to use:

SELECT * FROM User 
WHERE (DATEDIFF(dd, getdate(), DATEADD(yyyy, 
    DATEDIFF(yyyy, birthdate, getdate()) + 1, birthdate)) + 1) % 366 <= <number of days>

edit 10/2017: add single day to end

Answer 5

You could use the DAYOFYEAR function but be careful when you want to look for January birthdays in December. I think you'll be fine as long as the date range you're looking for doesn't span the New Year.

Answer 6

Sorry didn't see the requirement to neutralize the year.

select * from Employees
where DATEADD (year, DatePart(year, getdate()) - DatePart(year, Birthday), Birthday)
      between convert(datetime, getdate(), 101) 
              and convert(datetime, DateAdd(day, 5, getdate()), 101)

This should work.

Answer 7

I found the solution for this. This may save someone's precious time.

 select EmployeeID,DOB,dates.date  from emp_tb_eob_employeepersonal 
 cross join dbo.GetDays(Getdate(),Getdate()+7) as dates where weekofmonthnumber>0
 and month(dates.date)=month(DOB) and day(dates.date)=day(DOB)



GO
/****** Object:  UserDefinedFunction [dbo].[GetDays]    Script Date: 11/30/2011 13:19:17 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
--SELECT [dbo].[GetDays] ('02/01/2011','02/28/2011')

ALTER FUNCTION [dbo].[GetDays](@startDate datetime, @endDate datetime)
RETURNS @retValue TABLE
(Days int ,Date datetime, WeekOfMonthNumber int, WeekOfMonthDescription varchar(10), DayName varchar(10))
AS
BEGIN
    DECLARE @nextDay int
    DECLARE @nextDate datetime 
    DECLARE @WeekOfMonthNum int 
    DECLARE @WeekOfMonthDes varchar(10) 
    DECLARE @DayName varchar(10) 
    SELECT @nextDate = @startDate, @WeekOfMonthNum = DATEDIFF(week, DATEADD(MONTH, DATEDIFF(MONTH,0,@startDate),0),@startDate) + 1, 
    @WeekOfMonthDes = CASE @WeekOfMonthNum 
        WHEN '1' THEN 'First' 
        WHEN '2' THEN 'Second' 
        WHEN '3' THEN 'Third' 
        WHEN '4' THEN 'Fourth' 
        WHEN '5' THEN 'Fifth' 
        WHEN '6' THEN 'Sixth' 
        END, 
    @DayName 
    = DATENAME(weekday, @startDate)
SET @nextDay=1
WHILE @nextDate <= @endDate 
BEGIN 
    INSERT INTO @retValue values (@nextDay,@nextDate, @WeekOfMonthNum, @WeekOfMonthDes, @DayName) 
    SELECT @nextDay=@nextDay + 1 
SELECT @nextDate = DATEADD(day,1,@nextDate), 
    @WeekOfMonthNum 
    = DATEDIFF(week, DATEADD(MONTH, DATEDIFF(MONTH,0, @nextDate),0), @nextDate) + 1, 
    @WeekOfMonthDes 
    = CASE @WeekOfMonthNum 
    WHEN '1' THEN 'First' 
    WHEN '2' THEN 'Second' 
    WHEN '3' THEN 'Third' 
    WHEN '4' THEN 'Fourth' 
    WHEN '5' THEN 'Fifth' 
    WHEN '6' THEN 'Sixth' 
    END, 
    @DayName 
    = DATENAME(weekday, @nextDate) 
    CONTINUE 
END 

WHILE(@nextDay <=31)
BEGIN


    INSERT INTO @retValue values (@nextDay,@nextDate, 0, '', '') 
    SELECT @nextDay=@nextDay + 1

END

    RETURN
END

Make a cross join with the dates and check for the comparison of month and dates.

Answer 8

My guess is using "365.25" soon or later would be fail.

So I test the working solution using "365.25" And It don't return the same numbers of rows for every case. Here an example:

http://sqlfiddle.com/#!3/94c3ce/7

test with year 2016 and 2116 and you will see the difference. I only can post one link but change de /7 by /8 to see both queries. (/10 and /11 for the first answer)

So, I suggest this another query, where the point is determinate next birthday from a starting date and then compare if it is in my range of interest.

SELECT * FROM Employees 
WHERE 
CASE WHEN (DATEADD(yyyy,DATEDIFF(yyyy, birthdt, @fromDate),birthdt) < @fromDate )
THEN DATEADD(yyyy,DATEDIFF(yyyy, birthdt, @fromDate)+1,birthdt)
ELSE DATEADD(yyyy,DATEDIFF(yyyy, birthdt, @fromDate),birthdt) END
BETWEEN @fromDate AND @toDate

Answer 9

This is solution for MS SQL Server: It returns employees with birthdays in 30 days.

SELECT * FROM rojstni_dnevi
  WHERE (DATEDIFF   (dd, 
                    getdate(), 
                    DATEADD (   yyyy, 
                                DATEDIFF(yyyy, rDan, getdate()),
                                rDan)
    nex             )
        +365) % 365 < 30

Answer 10

In less than a month: 

SELECT * FROM people WHERE MOD( DATEDIFF( CURDATE( ) , `date_birth`) /30, 12 ) <1 and (((month(`date_birth`)) = (month(curdate())) and (day(`date_birth`)) > (day (curdate() ))) or ((month(`date_birth`)) > (month(curdate())) and (day(`date_birth`)) < (day (curdate() ))))

Answer 11

You could use DATE_FORMAT to extract the day and month parts of the birthday dates.

EDIT: sorry i didn't see that he wasn't using MySQL.

Answer 12

Assuming this is T-SQL, use DATEPART to compare the month and date separately.

http://msdn.microsoft.com/en-us/library/ms174420.aspx

Alternatively, subtract January 1st of the current year from everyone's birthday, and then compare using the year 1900 (or whatever your epoch year is).

Answer 13

Most of these solutions are close, but you have to remember a few extra scenarios. When working with birthdays and a sliding scale, you must be able to handle the transition into the next month.

For example Stephens example works great for birthdays up until the last 4 days of the month. Then you have a logic fault as the valid dates if today was the 29th would be :29, 30, AND then 1, 2, 3 of the NEXT month, so you have to condition for that as well.

An alternative would be to parse the date from the birthday field, and sub in the current year, then do a standard range comparison.

Answer 14

Another thought: Add their age in whole years to their birthday (or one more if their Birthday hasn't happened yet and then compare as you do above. Use DATEPART and DATEADD to do this.

http://msdn.microsoft.com/en-us/library/ms186819.aspx

The edge case of a range spanning the year would have to have special code.

Bonus tip: consider using BETWEEN...AND instead of repeating the Birthday operand.

Answer 15

This should work...

DECLARE @endDate DATETIME
DECLARE @today DATETIME

SELECT @endDate = getDate()+6, @today = getDate()

SELECT * FROM Employees 
    WHERE 
    (DATEPART (month, birthday) >= DATEPART (month, @today)
        AND DATEPART (day, birthday) >= DATEPART (day, @today))
    AND
    (DATEPART (month, birthday) < DATEPART (month, @endDate)
        AND DATEPART (day, birthday) < DATEPART (day, @endDate))

Answer 16

I faced the same problem with my college project a few years ago. I responded (in a rather weasel way) by splitting the year and the date(MM:DD) in two separate columns. And before that, my project mate was simply getting all the dates and programatically going through them. We changed that because it was too inefficient - not that my solution was any more elegant either. Also, its probably not possible to do in a database that has been in use for a while by multiple apps.

Answer 17

Give this a try:

SELECT * FROM Employees
WHERE DATEADD(yyyy, DATEPART(yyyy, @Today)-DATEPART(yyyy, Birthday), Birthday) > @Today 
AND DATEADD(yyyy, DATEPART(yyyy, @Today)-DATEPART(yyyy, Birthday), Birthday) < DATEADD(dd, @NumDays, @Today)

Answer 18

Nuts! A good solution between when I started thinking about this and when I came back to answer. :)

I came up with:

select  (365 + datediff(d,getdate(),cast(cast(datepart(yy,getdate()) as varchar(4)) + '-' + cast(datepart(m,birthdt) as varchar(2)) + '-' + cast(datepart(d,birthdt) as varchar(2)) as datetime))) % 365
from    employees
where   (365 + datediff(d,getdate(),cast(cast(datepart(yy,getdate()) as varchar(4)) + '-' + cast(datepart(m,birthdt) as varchar(2)) + '-' + cast(datepart(d,birthdt) as varchar(2)) as datetime))) % 365 < @NumDays

You don't need to cast getdate() as a datetime, right?

Answer 19

This is a combination of a couple of the answers that was tested. This will find the next brithday after a certain date and the age they will be. Also the numdays will limit the range you are looking 7 days = week etc.

SELECT DISTINCT FLOOR(DATEDIFF(dd,Birthday, @BeginDate) / 365.25) + 1 age,
DATEADD(yyyy, FLOOR(DATEDIFF(dd,Birthday, @BeginDate) / 365.25) + 1, Birthday) nextbirthday, birthday
FROM         table
WHERE     DATEADD(yyyy, FLOOR(DATEDIFF(dd,Birthday, @BeginDate) / 365.25) + 1, Birthday) > @BeginDate  
AND DATEADD(yyyy, FLOOR(DATEDIFF(dd,Birthday, @BeginDate) / 365.25) + 1, Birthday) < DATEADD(dd, @NumDays, @BeginDate)
order by nextbirthday

Answer 20

The best way to achieve the same is

DECLARE @StartDate DATETIME
DECLARE @EndDate DATETIME

SELECT Member.* from vwMember AS Member  
WHERE (DATEADD(YEAR, (DATEPART(YEAR, @StartDate) -
                      DATEPART(YEAR, Member.dBirthDay)), Member.dBirthDay)
BETWEEN @StartDate AND @EndDate)

Answer 21

Upcoming Birthday for the Employee - Sqlserver

DECLARE @sam TABLE
(
    EmployeeIDs     int,
    dob         datetime
)
INSERT INTO @sam (dob, EmployeeIDs)
SELECT DOBirth, EmployeeID FROM Employee

SELECT *
FROM
(
    SELECT *, bd_this_year = DATEADD(YEAR, DATEPART(YEAR, GETDATE()) - DATEPART(YEAR, dob), dob)
    FROM @sam s
) d
WHERE d.bd_this_year > DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()), 0)
AND d.bd_this_year <= DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()), 3)

Answer 22

I used this for MySQL, probably not the most efficient way to query but simple enough to implement.

select * from `schema`.`table` where date_format(birthday,'%m%d') >= date_format(now(),'%m%d') and date_format(birthday,'%m%d') < date_format(DATE_ADD(NOW(), INTERVAL 5 DAY),'%m%d');

Answer 23

i believe this ticket has been closed ages ago but for the benefit of getting the correct sql query please have a look.

SELECT Employee_Name, DATE_OF_BIRTH
FROM Hr_table 
WHERE 

/**
fetching the original birth_date and replacing the birth year to the current but have to  deduct 7 days to adjust jan 1-7 birthdate.
**/

datediff(d,getdate(),DATEADD(year,datediff(year,DATEADD(d,-7,hr.DATE_OF_BIRTH),getdate()),hr.date_of_birth)) between 0 and 7

-- current date looks ahead to 7 days for upcoming modified year birth date.

order by

-- sort by no of days before the birthday
datediff(d,getdate(),DATEADD(year,datediff(year,DATEADD(d,-7,hr.DATE_OF_BIRTH),getdate()),hr.date_of_birth))

Answer 24

Better and easy solution:

select * from users with(nolock)
where date_of_birth is not null 
and 
(
      DATEDIFF(dd,
                  DATEADD(yy, -(YEAR(GETDATE())-1900),GETDATE()), --Today
                  DATEADD(yy, -(YEAR(date_of_birth)-1901),date_of_birth)
      ) % 365
) = 30

Answer 25

I hope this helps u in some way....

select Employeename,DOB 
from Employeemaster
where day(Dob)>day(getdate()) and month(DOB)>=month(getDate())

Answer 26

This solution also takes care for birthdays in the next year and the ordering: (dob = day of birth; bty = birthday this year; nbd = next birthday)

with rs (bty) as (
    SELECT DATEADD(Year, DATEPART(Year, GETDATE()) - DATEPART(Year, dob), dob) as bty FROM Employees
),
rs2 (nbd) as (
  select case when bty < getdate() then DATEADD(yyyy, 1, bty) else bty end as nbd from rs
)
select nbd, DATEDIFF(d, getdate(), nbd) as diff from rs2 where DATEDIFF(d, getdate(), nbd) < 14 order by diff

This version, which avoids comparison of the dates, could be faster:

with rs (dob, bty) as (
    SELECT dob, DATEADD(Year, DATEPART(Year, GETDATE()) - DATEPART(Year, DOB), DOB) as bty FROM employee
),
rs2 (dob, nbd) as (
  select dob,  DATEADD(yyyy, FLOOR(ABS((-1*(SIGN(DATEDIFF(d, getdate(), bty))))+0.1)), bty) as nbd from rs
),
rs3 (dob, diff) as (
  select dob, datediff(d, getdate(), nbd) as diff from rs2
)
select dob, diff  from rs3 where diff < 14 order by diff

If the range covers the 29 of February in the next year, then use:

with rs (dob, ydiff) as (
  select dob, DATEPART(Year, GETDATE()) - DATEPART(Year, DOB) as ydiff from Employee
),
rs2 (dob, bty, ydiff) as (
  select dob, DATEADD(Year, ydiff, dob) as bty, ydiff from rs
),
rs3 (dob, nbd) as (
  select dob, DATEADD(yyyy, FLOOR(ABS((-1*(SIGN(DATEDIFF(d, getdate(), bty))))+0.1)) +  ydiff, dob) as nbd from rs2
),
rs4 (dob, ddiff, nbd) as (
  select dob, datediff(d, getdate(), nbd) as diff, nbd from rs3
)
select dob, nbd, ddiff from rs4 where ddiff < 68 order by ddiff

Answer 27

You can also use DATEPART:

-- To find out Today's Birthday
DECLARE @today DATETIME
SELECT  @today = getdate()

SELECT *
FROM SMIS_Registration 
WHERE (DATEPART (month, DOB) >= DATEPART (month, @today)
      AND DATEPART (day, DOB) = DATEPART (day, @today))

Answer 28

Current months birthday

SELECT * FROM tblMember m
WHERE m.GDExpireDate != '' 
AND CONVERT(CHAR(2),CONVERT(datetime, m.dob, 103), 101) = CONVERT(CHAR(2), GETDATE(), 101)    
AND CONVERT(CHAR(2),CONVERT(datetime, m.dob, 103), 103) >= CONVERT(CHAR(2), GETDATE(), 103)

Answer 29

select BirthDate,Name from Employees order by Case WHEN convert(nvarchar(5),BirthDate,101) > convert(nvarchar(5),GETDATE(),101) then 2 WHEN convert(nvarchar(5),BirthDate,101) < convert(nvarchar(5),GETDATE(),101) then 3 WHEN convert(nvarchar(5),BirthDate,101) = convert(nvarchar(5),GETDATE(),101) then 1 else 4 end ,convert(nvarchar(2),BirthDate,101),convert(nvarchar(2),BirthDate,105)

Answer 30

Below query will return all next birthday of employee, it is shortest query.

SELECT 
    Employee.DOB,
    DATEADD(
                mm, 
                (
                    (
                        (
                            (
                                DATEPART(yyyy, getdate())-DATEPART(yyyy, Employee.DOB )
                            )
                            +
                            (
                                1-
                                (
                                    ((DATEPART(mm, Employee.DOB)*100)+DATEPART(dd, Employee.DOB))
                                    /
                                    ((DATEPART(mm, getdate())*100) + DATEPART(dd, getdate()))
                                )
                            )
                        )
                    *12
                    )
                ), 
                Employee.DOB
            ) NextDOB
FROM 
    Employee 
ORDER BY 
    NextDOB ;

Above query will cover all next month excluding current date.