i have a MySql table full of measurement data.

The measurement date in the table is stored in 5 separate columns: `year, month, day, hour, minute.`

What i would like to do is to add an extra column with the complete date, in a DateTime format.

So when i have the values 

```
 year, month, day, hour, minute
  2013  ,1,    13,  17,    15,

```

there is a datetime field filled with the value `'2013-01-13 17:15:00'`

I'll add the column first, and after that i would like to execute a sql statement to fill the datetime field.

Can you help me with this sql statement?

(i don't know if it matters, but the statement should run from phpmyadmin)