Looking for birthday with PHP and MySQL

birth date - mysql birthday - php mysql

getting all birthday inside database with PHP

Looking for birthday with PHP and MySQL

We often experience difficulty to find the birthday between two dates inside MySQL database. It is caused by the storage we use in MySQL, namely brith date format like Y-m-d, for example 2000-12-21.

The problem occurs when we try to find the birthday between years, such as between Dec 15, 2020 to Jan 14, 2021.

To explain this, let say we use colum namely: tgl_lahir, with values as follows:

  • Jaka: 1997-02-01
  • Mega: 2001-01-14
  • Satria: 2000-12-21

Now we want to find who has birthday between January 10, 2021 and February 02, 2021. It is easier because it has same year, so we can find it with range of date and month in tgl_lahir.

The SQL query is like below

$result=doQuery("select * from [table] where (DATE_FORMAT(tgl_lahir, '%m-%d') 
DATE_FORMAT(?, '%m-%d'))
order by RIGHT(tgl_lahir,5) ASC", Array('2021-01-10','2021-02-02'));

doQuery is sql query according to mysql class we us.
BETWEEN is MySQLfunction to find data between X and Y.
order by RIGHT(tgl_lahir,5) ASC means that we sort  the result of  RIGHT(tgl_lahir,5), where RIGHT(tgl_lahir,5) is MySQL function to get 5 characters from the right. If the value is: 2001-01-14, so  RIGHT(tgl_lahir,5) is 01-14.

The result of query above is:

  • Mega: 2001-01-14
  • Jaka: 1997-02-01

The query will be different if we try to find birthday between December 20, 2020 and January 15, 2021. The query above cannot be used because it has different year.
Here it is the query:

$result=doQuery("select *, if(MONTH(tgl_lahir)>MONTH('2021-01-15'), MONTH(tgl_lahir), MONTH(tgl_lahir)+12) ord,
if(DAY(tgl_lahir)>DAY('2021-01-15"'), DAY(tgl_lahir), DAY(tgl_lahir)+31) ord2
where ( (DATE_FORMAT(tgl_lahir, '%m-%d') 
	DATE_FORMAT(?, '%m-%d'))
	(DATE_FORMAT(tgl_lahir, '%m-%d') 
	DATE_FORMAT(?, '%m-%d')) ) order by ord,ord2",

There are many variables we use here.

if(MONTH(tgl_lahir)>MONTH('2021-01-15'), MONTH(tgl_lahir), MONTH(tgl_lahir)+12) means that if birth month > 01 (January), then return birth month, else it will be added 12.
The same method is used too for if(DAY(tgl_lahir)>DAY('2021-01-15"'), DAY(tgl_lahir), DAY(tgl_lahir)+31) ord2

It is used, so we can use BETWEEN function because the last date is higher than from date.

The result is as follows:

  • Satria: 2000-12-21
  • Mega: 2001-01-14

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