MySQL Case/If/Then

Question

I am trying to build a query in MySQL, where I have a numeric stock level of something and depending on what that stock level is, I want it to return another value that woul

Answer 1

Something like this should work using the CASE statement:

SELECT Beer, Brewery, Style, ABV, SRM, SummedQty, 
    CASE 
       WHEN SummedQty >=0 AND SummedQty <= 1000 THEN ' RED'
       WHEN SummedQty >1000 AND SummedQty <= 5000 THEN ' YELLOW'
       WHEN SummedQty >5000 THEN ' GREEN'
       ELSE ''
    END yourcolor
FROM (
    SELECT Beer.Beer, Beer.Brewery, Beer.Style, Beer.ABV, Beer.Hops, Beer.SRM,
       Sum(BeerStock.Quantity) SummedQty
    FROM Beer
       INNER JOIN BeerStock  
          ON Beer.Beer = BeerStock.Beer
    ) t

Be careful using BETWEEN -- it may not return your desired results. I prefer using greater than and less than. I also converted your JOIN syntax to an INNER JOIN.