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Thread: calculating age

120203, 17:46 #1Registered User
 Join Date
 Dec 2003
 Posts
 7
Unanswered: calculating age
hi all,
Iam trying different queries for calculating the age of a set of people whose data of birth is one of the fields in my table. Can someone help me out with it?
Thks,
Pradeep.

120203, 17:48 #2Super Moderator
 Join Date
 Aug 2001
 Location
 UK
 Posts
 4,650
Re: calculating age
Have a look at the TIMESTAMPDIFF function in SQL Reference ...
Link for db2manuals can be found in www.db2click.com
If this function does not satisfy your needs, please post more details on what you would like to achieve
Cheers
Sathyaram
Originally posted by pradeep_cis
hi all,
Iam trying different queries for calculating the age of a set of people whose data of birth is one of the fields in my table. Can someone help me out with it?
Thks,
Pradeep.Visit the newlook IDUG Website , register to gain access to the excellent content.

120203, 17:54 #3Registered User
 Join Date
 Dec 2003
 Posts
 7
Re: calculating age
A more direct answer please... if you can...(I want the query real quick... if it is simple)
Thks,
Pradeep.
Originally posted by sathyaram_s
Have a look at the TIMESTAMPDIFF function in SQL Reference ...
Link for db2manuals can be found in www.db2click.com
If this function does not satisfy your needs, please post more details on what you would like to achieve
Cheers
Sathyaram

120203, 17:57 #4Super Moderator
 Join Date
 Aug 2001
 Location
 UK
 Posts
 4,650
Re: calculating age
SQL Reference extract :
TIMESTAMPDIFF scalar function
>>TIMESTAMPDIFF(expression,expression)><
The schema is SYSFUN.
Returns an estimated number of intervals of the type defined by the first argument, based on the difference between two timestamps.
The first argument can be either INTEGER or SMALLINT. Valid values of interval (the first argument) are:
1
Fractions of a second
2
Seconds
4
Minutes
8
Hours
16
Days
32
Weeks
64
Months
128
Quarters
256
Years
The second argument is the result of subtracting two timestamps and converting the result to CHAR(22).
The result of the function is INTEGER. The result can be null; if the argument is null, the result is the null value.
The following assumptions may be used in estimating a difference:
There are 365 days in a year.
There are 30 days in a month.
There are 24 hours in a day.
There are 60 minutes in an hour.
There are 60 seconds in a minute.
These assumptions are used when converting the information in the second argument, which is a timestamp duration, to the interval type specified in the first argument. The returned estimate may vary by a number of days. For example, if the number of days (interval 16) is requested for the difference between '1997030100.00.00' and '1997020100.00.00', the result is 30. This is because the difference between the timestamps is 1 month, and the assumption of 30 days in a month applies.
Example:
The following example returns 4277, the number of minutes between two timestamps:
TIMESTAMPDIFF(4,CHAR(TIMESTAMP('2001092911.25.42.483219') 
TIMESTAMP('2001092612.07.58.065497')))Visit the newlook IDUG Website , register to gain access to the excellent content.

120203, 18:10 #5Registered User
 Join Date
 Dec 2003
 Posts
 7
Re: calculating age
OK I am awful bad at this. I want to retrieve the current time and use it to compare with the birthday. Then calculate the age in years...
Originally posted by sathyaram_s
SQL Reference extract :
TIMESTAMPDIFF scalar function
>>TIMESTAMPDIFF(expression,expression)><
The schema is SYSFUN.
Returns an estimated number of intervals of the type defined by the first argument, based on the difference between two timestamps.
The first argument can be either INTEGER or SMALLINT. Valid values of interval (the first argument) are:
1
Fractions of a second
2
Seconds
4
Minutes
8
Hours
16
Days
32
Weeks
64
Months
128
Quarters
256
Years
The second argument is the result of subtracting two timestamps and converting the result to CHAR(22).
The result of the function is INTEGER. The result can be null; if the argument is null, the result is the null value.
The following assumptions may be used in estimating a difference:
There are 365 days in a year.
There are 30 days in a month.
There are 24 hours in a day.
There are 60 minutes in an hour.
There are 60 seconds in a minute.
These assumptions are used when converting the information in the second argument, which is a timestamp duration, to the interval type specified in the first argument. The returned estimate may vary by a number of days. For example, if the number of days (interval 16) is requested for the difference between '1997030100.00.00' and '1997020100.00.00', the result is 30. This is because the difference between the timestamps is 1 month, and the assumption of 30 days in a month applies.
Example:
The following example returns 4277, the number of minutes between two timestamps:
TIMESTAMPDIFF(4,CHAR(TIMESTAMP('2001092911.25.42.483219') 
TIMESTAMP('2001092612.07.58.065497')))

120203, 18:22 #6Registered User
 Join Date
 May 2003
 Location
 USA
 Posts
 5,737
Here is an example of a query against the sample database:
SELECT
firstnme,
midinit,
lastname,
birthdate,
year(current date  birthdate) as age
FROM employee
WHERE year(current date  birthdate) >= 65;M. A. Feldman
IBM Certified DBA on DB2 for Linux, UNIX, and Windows
IBM Certified DBA on DB2 for z/OS and OS/390

120203, 18:29 #7SQL Consultant
 Join Date
 Apr 2002
 Location
 Toronto, Canada
 Posts
 20,002
Code:select year(current_date)  year(birthdate)  case when month(current_date) > month(birthdate) then 0 when month(current_date) < month(birthdate) then 1 when day(current_date) < day(birthdate) then 1 else 0 end as age from yourtable
http://r937.com/

120203, 18:32 #8Registered User
 Join Date
 Dec 2003
 Posts
 7
Kool! Just what I wanted!
Thankyou Marcus and Satyaram!
Pradeep.
Originally posted by Marcus_A
Here is an example of a query against the sample database:
SELECT
firstnme,
midinit,
lastname,
birthdate,
year(current date  birthdate) as age
FROM employee
WHERE year(current date  birthdate) >= 65;