Why does my SQL query give this error? - mysql

Question

I can't figure out why I keep getting error #1054 - Unknown column 'Filename' in 'field list'
SELECT 'R' AS Type, er.ID, er.RecipeID AS RecipeID,
RecipeName AS Name,er.Quantity,UnitID,
SUBSTRING_INDEX(PFCC,',',1) AS Protein,
SUBSTRING_INDEX(SUBSTRING_INDEX(PFCC,',',2),',',-1) AS Fat,
SUBSTRING_INDEX(SUBSTRING_INDEX(PFCC,',',-2),',',1) AS Carbs,
SUBSTRING_INDEX(PFCC,',',-1) AS Calories,
Rating, AvgRating, AvgCount, 0 AS SpecificID,
COALESCE(rimg.Filename,'0.png') AS DefaultImage,
s.Price, s.MaxQuantity
FROM `event-recipe` er
LEFT JOIN(
SELECT r.ID,RecipeName,
SUM(Quantity) AS Quantity,
IFNULL(Rating,0) AS Rating
FROM recipe r
LEFT JOIN(
SELECT RecipeID, Filename
FROM recipe_image
WHERE IsDefault) rimg
ON r.ID=rimg.RecipeID
LEFT JOIN `recipe-ingredient` ri
ON r.ID=ri.RecipeID
LEFT JOIN(
SELECT RecipeID,Rating
FROM `recipe-rating`
WHERE CustomerID=2) rr
on r.ID=rr.RecipeID
GROUP BY r.ID) r ON er.RecipeID=r.ID
LEFT JOIN(
SELECT RecipeID, GROUP_CONCAT(Value ORDER BY Nutr_No) AS PFCC
FROM nutrient_view_ingredient nv
WHERE Nutr_No IN (203,204,205,208)
GROUP BY RecipeID) n
ON r.ID=n.RecipeID
LEFT JOIN sell_recipe s ON (er.EventID=s.EventID AND s.RecipeID=er.RecipeID)
LEFT JOIN(
SELECT RecipeID, COUNT(RecipeID) AS AvgCount, ROUND(AVG(Rating),1) AS AvgRating
FROM `recipe-rating`
GROUP BY RecipeID) avgrate
ON r.ID=avgrate.RecipeID
WHERE er.EventID=53

Answer 1

The issue is in how you've used your parentheses to group your table, as well as the fact that you never select filename in the inner join.
The first big join, which you've named r is the table that has reference to filename. No where in that table do you select rimg.fileName so in the outer query, you can't even call r.fileName. To fix it, change the line:
SELECT r.ID, RecipeName
To:
SELECT r.ID, RecipeName, rimg.FileName
Then, in your outer query, you can select r.FileName.