How can I do boolean logic on two columns in MySQL?

Question

I want to do a select in MySql that combines several columns... something like this pseudocode:

SELECT payment1_paid AND payment2_paid AS paid_in_full 
FROM          


        

Answer 1

Just do

Select CONCAT(payment1_paid, payment2_paid) as paid_in_full 
from denormalized_payments 
where payment1_type = 'check';

You can concat any number of field you want.