How to substring a MySQL table column

Question

I want to select a field from table and substring it.

For example:

VAN1031 --> 1031

I tried this, but is improper syntax:

<

Answer 1

SELECT substring(R.regnumber FROM 4) FROM registration AS R;

and if you want to take the part as an integer not a string you can write:

SELECT CAST(substring(R.regnumber FROM 4) AS UNSIGNED) FROM registration as R;