How to join tables , query sql - sql

Question

I have the following recipe database tables and their data .
how i can find the total number of recipes , number of category for each Ingredient ? I used many joining methods but i couldn't do the query i want.
I need as out put
Ingredient id , how much recipe we can find this ingredient in, how much categories we can find this ingredients in.
This is my attempt
The problem with my attempt is if i had ingredient who is in one recipe and in two categories
It will show in results that this ingredient is in 2 recipe , 2 categories
SELECT
I.idIng,COUNT(CI.idcat)AS "CAT FOR ING" , COUNT(RI.idRecipe )AS "RECETTE
FOR
ING"
FROM
INGREDIENT I
LEFT JOIN
Ingredient_Recipe RI ON I.idIng = ri.idIng
RIGHT JOIN
Ingredient_Catigory CI ON I.idIng = CI.idIng
GROUP BY
I.idIng
ORDER BY
I.idIng;
Below is some test data:
Here i created my category its will have many to many relation with Ingredient.
-- creating table cat category
CREATE TABLE category (
idCat INT NOT NULL PRIMARY KEY,
nomCat INT NOT NULL
);
Here i created my Recipe table its will have many to many relation with Ingredient.
-- creating table cat Recipe
CREATE TABLE Recipe(
idRecipe INT NOT NULL PRIMARY KEY,
nameRecipe VARCHAR2(30) NOT NULL
);
This is my Ingredient table that will be link with both Recipe ,category .
-- creating table Ingredient
CREATE TABLE Ingredient(
idIng INT NOT NULL PRIMARY KEY ,
nameIng VARCHAR2(30) NOT NULL
);
This is the intermediate table between Ingredient ,category because the relation is many to many.
-- creating table Ingredient_category
CREATE TABLE Ingredient_category (
idIng INT NOT NULL,
idCat INT NOT NULL,
CONSTRAINT idIng_FK FOREIGN KEY (idIng) REFERENCES Ingredient(idIng),
CONSTRAINT idCat_FK FOREIGN KEY (idCat) REFERENCES category(idCat)
);
This is the intermediate table between Ingredient ,Recipe because the relation is many to many.
-- creating table Ingredient_Recipe
CREATE TABLE Ingredient_Recipe(
idIng INT NOT NULL,
idRecipe INT NOT NULL,
CONSTRAINT idIngRecipe_FK FOREIGN KEY (idIng) REFERENCES
Ingredient(idIng),
CONSTRAINT idRecipe_FK FOREIGN KEY (idRecipe) REFERENCES Recipe(idRecipe)
);
Here we insert the data for testing.
-- insert data into Recipe
INSERT INTO Recipe VALUES(1,'SOUP');
INSERT INTO Recipe VALUES(2,'FRIED');
INSERT INTO Recipe VALUES(3,'BURGER');
-- insert data into category
INSERT INTO category VALUES(1,'VEGES');
INSERT INTO category VALUES(2,'DAIRY');
INSERT INTO category VALUES(3,'MEAT');
INSERT INTO category VALUES(4,'ANIMAL PRODUCT');
-- insert data into Ingredient
INSERT INTO Ingredient VALUES (1,'Eggs');
INSERT INTO Ingredient VALUES (2,'milk');
INSERT INTO Ingredient VALUES (3,'Beef');
INSERT INTO Ingredient VALUES (4,'chess');
-- insert data into Ingredient_Catigory
INSERT INTO Ingredient_Catigory VALUES(1,4);
INSERT INTO Ingredient_Catigory VALUES(2,2);
INSERT INTO Ingredient_Catigory VALUES(2,4);
INSERT INTO Ingredient_Catigory VALUES(3,3);
INSERT INTO Ingredient_Catigory VALUES(3,4);
INSERT INTO Ingredient_Catigory VALUES(4,2);
INSERT INTO Ingredient_Catigory VALUES(4,4);
-- insert data into Ingredient_Recip
INSERT INTO Ingredient_Recipe VALUES (1,2);
INSERT INTO Ingredient_Recipe VALUES (1,3);
INSERT INTO Ingredient_Recipe VALUES (2,1);
INSERT INTO Ingredient_Recipe VALUES (3,3);
INSERT INTO Ingredient_Recipe VALUES (3,2);

Answer 1

I think you're looking for COUNT(DISTINCT value), you're almost there. Try something like this;
SELECT
I.idIng,
COUNT(DISTINCT CI.idCat)AS [Categories],
COUNT(DISTINCT RI.idRecipe)AS [Recipes]
FROM #INGREDIENT I
LEFT JOIN #Ingredient_Recipe RI ON I.idIng = ri.idIng
LEFT JOIN #Ingredient_Category CI ON I.idIng = CI.idIng
GROUP BY
I.idIng
ORDER BY
I.idIng
The results look like this;
idIng Categories Recipes
1 1 2
2 2 1
3 2 2
4 2 0
Please note, I think a bit of the spelling was incorrect in the sample data but I've corrected it on my test system (and I've used #TempTables). I've changed your RIGHT JOIN to a LEFT JOIN (as a note, I've never seen a need to use RIGHT JOIN in production code, try to avoid them).
Edit: I've just noticed that this is now an Oracle question, the query above has only been tested on SQL Server although a cursory glance at the documentation shows that the syntax should be the same for Oracle too.

Answer 2

select * from Ingredient_Recipe a join Ingredient_category b on a.idIng=b.idIng join Ingredient c on a.idIng=c.idIng join Recipe d on a.idRecipe=d.idRecipe join category e on b.idCat=e.idCat
try this out