Add a total of summaries at the top of SQL (Access) - sql

Question

I have a table of foods (FOODS) and a table of food groups (FOOD_GROUP). I have build a list to summarize available food count for each group based on the search term entered by the user:
SELECT FOOD_GROUP.FoodGroupID, FOOD_GROUP.FoodGroupName, Count(FOODS.FoodID) AS CntOfFoodID
FROM FOOD_GROUP LEFT JOIN FOODS ON FOOD_GROUP.FoodGroupID = FOODS.FoodGroupID
WHERE (((FOODS.FoodName) Like ("*" & [Forms]![FoodSearch]![search_term] & "*")))
GROUP BY FOOD_GROUP.FoodGroupID, FOOD_GROUP.FoodGroupName
ORDER BY FOOD_GROUP.FoodGroupName;
But now it gets tricky. I want to add a summary row at the top that list. Here is a nearly simmilar example:
I guess I must do something like:
SELECT '0000', 'Show all foods', Count(FOODS.FoodID) AS CntOfFoodID
FROM FOODS
WHERE (((FOODS.FoodName) Like ("*" & [Forms]![FoodSearch]![search_term] & "*")))
UNION
SELECT FOOD_GROUP.FoodGroupID, FOOD_GROUP.FoodGroupName, Count(FOODS.FoodID) AS CntOfFoodID
FROM FOOD_GROUP LEFT JOIN FOODS ON FOOD_GROUP.FoodGroupID = FOODS.FoodGroupID
WHERE (((FOODS.FoodName) Like ("*" & [Forms]![FoodSearch]![search_term] & "*")))
GROUP BY FOOD_GROUP.FoodGroupID, FOOD_GROUP.FoodGroupName
ORDER BY FOOD_GROUP.FoodGroupName;
But GROUP BY fails and if I take out GROUP BY than FoodGroupID is missing.
Any hints?

Answer 1

I think this should work:
SELECT '0000', 'Show all foods', Count(f.FoodID) AS CntOfFoodID
FROM FOODS as f
WHERE f.FoodName Like "*" & [Forms]![FoodSearch]![search_term] & "*"
UNION ALL
SELECT fg.FoodGroupID, fg.FoodGroupName, Count(f.FoodID) AS CntOfFoodID
FROM FOOD_GROUP fg LEFT JOIN
FOODS as f
ON fg.FoodGroupID = f.FoodGroupID
WHERE f.FoodName Like "*" & [Forms]![FoodSearch]![search_term] & "*"
GROUP BY fg.FoodGroupID, fg.FoodGroupName
ORDER BY 1;
The changes are:
Use UNION instead of UNION ALL. This is more efficient.
The ORDER BY does not refer to a column name (especially one only in the second subquery).
The use of table aliases just simplifies the query; it doesn't affect the logic or performance.