CREATE TABLE table_train_90 ("id" INT, "gender" TEXT, "alzheimer" BOOLEAN, "breast_cancer" BOOLEAN, "smoking" BOOLEAN, "heart_rate" INT, "age" FLOAT, "NOUSE" FLOAT)

minimum age is 45 for patients with alzheimer's disease; 50 for normal volunteers
SELECT * FROM table_train_90 WHERE (alzheimer = 1 AND age >= 45) OR (alzheimer = 0 AND age > 50)
SELECT * FROM "table_train_90" WHERE ("age" > 50 OR "alzheimer" = 1) AND "age" >= 45 AND ("alzheimer" = 0 OR "alzheimer" = 1)