Insert and set value with max()+1 problems

Question

I am trying to insert a new row and set the customer_id with max()+1. The reason for this is the table already has a auto_increatment on another column named id and the tabl

Answer 1

Use table alias in subquery:

INSERT INTO customers
  ( customer_id, firstname, surname )
VALUES 
  ((SELECT MAX( customer_id ) FROM customers C) +1, 'jim', 'sock')