CREATE TABLE Allergy_Type (Allergy VARCHAR2, allergytype VARCHAR2)
CREATE TABLE Has_allergy (Allergy VARCHAR2)
CREATE TABLE Student (sex VARCHAR2, StuID VARCHAR2)

Find the number of male (sex is 'M') students who have some food type allery.
SELECT COUNT(*) FROM Student WHERE sex = "M" AND StuID IN (SELECT StuID FROM Has_allergy AS T1 JOIN Allergy_Type AS T2 ON T1.Allergy = T2.Allergy WHERE T2.allergytype = "food")
SELECT COUNT(*) FROM "Student" WHERE "M" = "sex" AND "StuID" IN (SELECT "StuID" FROM "Has_allergy" "T1" JOIN "Allergy_Type" "T2" ON "T1"."Allergy" = "T2"."Allergy" AND "T2"."allergytype" = "food")