Comments on: MySQL-Query: Howto select upcoming birthdays

By: smronju

smronju — Wed, 01 Feb 2012 09:54:59 +0000

Thanks you saved my day :)

By: Patrick

Patrick — Wed, 30 Nov 2011 00:23:50 +0000

Your query for the new_age has “>” (greater than) instead. Yours is definitely better and more efficient.

By: Patrick

Patrick — Wed, 30 Nov 2011 00:21:25 +0000

I see now why we are having different results.

Your query has instead. Yours is definitely better and more efficient.

Sorry for making a scene.

Thanks for your help though! :)

By: Patrick

Patrick — Tue, 29 Nov 2011 18:22:50 +0000

Know what, sorry about the last comment. Obviously I’m not 100% awake.

You are correct, the “new_age” for both #1 and #2 should be 12.

I’ll try this out tonight when I get back home from work because I’m a little busy at the moment. I’ll let you know what I find out.

Thanks!

By: Patrick

Patrick — Tue, 29 Nov 2011 17:07:31 +0000

Yes, thanks for that but if you look at your person #1, his birthday is 2000-01-04 and is 12 years old on 2011-11-25.

After 40 days however, he should be 13 years old (new_age).

The same is true for your person #2.

After 365 days, his “new_age” should be 13.

By: Tobias

Tobias — Fri, 25 Nov 2011 20:04:01 +0000

Thanks for your reply. But the statement as posted on the top is correct. Try it again with the following dates, and you should get the same results like me (supposed today is 2011-11-25): || *user_id* || *birthday* || *new_age* || *days_to_birthday* || || 1 || 2000-01-04 || 12 || 40 || || 2 || 2000-11-24 || 12 || 365 || || 3 || 2000-11-25 || 11 || 0 || || 4 || 2000-11-26 || 11 || 1 ||

#2 (who has had birthday yesterday) has to wait 365 more days. That means the leap year is taken into consideration: 2012-11-25 is 366 days from today.
#3 Happy birthday to you: you are getting 11 years old today.
#4 can celebrate his 11th birthday tomorrow.
#1 has to wait 40 more days until his 12th birthday.

By: Patrick

Patrick — Fri, 25 Nov 2011 17:37:06 +0000

~Here’s the fix I was talking about~

For the line that says:

DATE_FORMAT(@today, ‘%Y’) – DATE_FORMAT(birthday, ‘%Y’) + IF(
DATE_FORMAT(birthday, “%m%d”) < DATE_FORMAT(@today, "%m%d"), 1, 0) AS new_age,

I just replaced 0 with:

IF(DATE_FORMAT(birthday, "%m%d") = DATE_FORMAT(@today, "%m%d"), 0, 1)

By: Patrick

Patrick — Fri, 25 Nov 2011 17:06:00 +0000

This is great, worked like a charm.
Although I found one little problem if the birthdate is next year.

Ex. Today is Nov 25 and the birthdate is Jan 4, the new_age is short by 1. I’ll try fixing this on my own and hopefully I remember to post it here. Anyway, thanks!

By: Mario

Mario — Tue, 22 Feb 2011 17:56:37 +0000

Another saved day! thank you!

By: jamal

jamal — Mon, 06 Dec 2010 11:50:42 +0000

hey, you rock. I used your code and it’s working fantastic.