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

You don't need the third argument (length) if you want to select all the characters to the right of a specific index:

SELECT SUBSTR(R.regnumber, 4)
FROM registration AS R

I also changed the start index to 4 because in SQL strings are 1-indexed and not 0-indexed as they are in many popular programming languages.