How to store Birthdate and Age so that Age can be updated daily in PHP/MySQL?

Question

How should I store Birthdate\'s in MySQL so that I can easily update everyone\'s Age on a daily basis via a Cron Job?

Does it even make sense to sto

Answer 1

Im going to go against the majority all of the answers here.

I would store both ...

• updating the age is quick and simple - a single mysql query could run every day and its done
• calculating the age is time consuming when you have lots of page views - amount of times its viewed far outweighs the number of changes

Just imagine a table scenario - a table with 100 or 1000 rows that shows the age of a person ... how long is that going to take to compute ???

I always thought that Stackoverflow calculated the Reputation dynamically but you can see on the Stackoverflow data explorer that they dont - see the User object in the schema on the right. Its recorded and updated each time its changed - I would guess that this is purely because of the amount of times its viewed far outweighs the number of changes