How to join two tables based on substring values of fields?

Question

I am having problem with sql. I want to join two tables, employee and class instructor. Condition is that employee is having unid column like \'u0871457\' where as class i

Answer 1

select e.name, i.name
 from  Employee e
 inner join Instructor i on SUBSTR(e.id, 2, LENGTH(e.id) - 1) = SUBSTR(i.id, 2, LENGTH(i.id) - 1)

Your DB uses 1-based indexing.