MySQL How do I create this subquery?

Question

I have the following tables

Table Farm

+---------+--------+-------------------+-----------+------------+
| FARM_ID |Stock_ID| FARM_T         


        

Answer 1

Here is the query I've been working on. However, the results are slighly different from the ones you've posted in your question:

select o.origin_name, s.stock_title, sum(
  case f.size
    when 'H' then
      case
        when sizes = 'H,L,M' then 70
        when sizes = 'H,M' then 80
        when sizes = 'H,L' then 90
        when sizes = 'H' then 100
        else 0
      end
    when 'M' then
      case
        when sizes = 'H,L,M' then 20
        when sizes = 'H,M' then 20
        when sizes = 'L,M' then 60
        when sizes = 'M' then 100
        else 0
      end
    else
      case
        when sizes = 'H,L,M' then 10
        when sizes = 'L,M' then 40
        when sizes = 'H,L' then 10
        when sizes = 'L' then 100
        else 0
      end
  end * r.score / 100) FinalScore
from farm f
join (
  select f.stock_id, group_concat(distinct f.size order by f.size) sizes
  from farm f
  join results r on f.farm_id = r.farm_id
  group by f.stock_id
) stockSizes on f.stock_id = stockSizes.stock_id
join results r on f.farm_id = r.farm_id
join (
  select f.stock_id, r.gate_id
  from results r
  join farm f on r.farm_id = f.farm_id
  group by f.stock_id, r.gate_id
  having sum(r.score = 0) = 0
) FullGates
on FullGates.stock_id = f.stock_id and FullGates.gate_id = r.gate_id
join stock s on s.stock_id = f.stock_id
join origin o on o.origin_id = s.origin_id
group by o.origin_id, s.stock_id

Result:

+-------------+-------------+------------+
| ORIGIN_NAME | STOCK_TITLE | FINALSCORE |
+-------------+-------------+------------+
| US          | P1          |         93 |
| CA          | P3          |         90 |
| MX          | Q4          |        100 |
| MX          | B3          |        100 |
+-------------+-------------+------------+

Let me know if this did the trick.