Question

In 1_products t2 I have other columns called make,model

When I add them

(SELECT 
            t2.code,t2.make,t2.model
        FROM .....

I get

Error 1241 Operand should contain 1 column(s)

SELECT 
    t1.fk_products_id,
    (SELECT 
            t2.code
        FROM
            1_products t2
        WHERE
            t2.id = t1.fk_products_id
        order by code
        limit 1)
FROM
    1_stock t1
WHERE
    t1.branch = 1 and t1.dispatch <> 0;

Answer 1

You cannot return more than one column in an inline query. If you want to return more than one column for each t1.fk_products_id then you will have to rewrite the query similar to this:

SELECT t1.fk_products_id,
  t2.code,
  t2.make,
  t2.model
FROM 1_stock t1
LEFT JOIN 1_products t2
  on t1.fk_products_id = t2.id
WHERE t1.branch = 1 
  and t1.dispatch <> 0;