Question

I am trying to calculate age with the SQL statement below

round(datediff(now() - dateofbirth / 365))

gives the following error,

1582 – Incorrect parameter count in the call to native function ‘datediff’

Answer 1

Problem : datediff expects two parameters like DATEDIFF(expr1,expr2) , as per the given question, there is only one parameter hence error.

Solution : you have to use,

round(datediff(now() , (dateofbirth / 365)))
                     ^

the datediff returns expression1 – expression2, so you dont have to do it by yourself 🙂 also make sure the parameters are date or date-and-time expressions

EDIT : Another error pointed out by @Jonathan Leffler,division is needed after the call to DATEDIFF.

round(datediff(now(),dateofbirth)/365)