Calucate age from birth date in mysql [duplicate]

Answer 1

From MySQL's date and time functions, we can combine TIMESTAMPDIFF, NOW, and FROM_UNIXTIME.

Supposing that dob is a Unix timestamp representing date of birth:

 TIMESTAMPDIFF(YEAR, FROM_UNIXTIME(dob), NOW())

From there, it's simple enough to add a WHERE clause based on the column value.

Live demo on SQLFiddle.

Answer 2

You can get the year and month of the timestamp with YEAR and MONTH functions respectively:

SELECT from_unixtime(birthdate),FLOOR((YEAR(CURDATE())*12+MONTH(CURDATE()) -(YEAR(from_unixtime(birthdate))*12+MONTH(from_unixtime(birthdate)))) / 12) as age FROM `table1` 

and here is sqlfiddle

Answer 3

SELECT FLOOR((unix_timestamp() - birthday)/(86400*365)) AS age FROM table;

Answer 4

Use PERIOD_DIFF and let MySQL handle differences in leap years and other time stuff. You said age, so I am assuming YEARS / MONTHS is good enough.

select period_diff(from_unixtime(1196440219, "%Y%m"), from_unixtime(1099440219, "%Y%m"))

returns back 36 months;

Simple exercise to convert to years :)

Could also use timestampdiff. Need to do the same style parsing of the unix timestamp

select timestampdiff(YEAR, from_unixtime(1099440219, "%Y-%m-%d"), from_unixtime(1196440219, "%Y-%m-%d"))

Thanks!