Use query tree to optimize the following query
SELECT reps.name, off.city
FROM salesreps reps, offices off
WHERE reps.rep_office=off.office
AND reps.sales<=reps.quota
AND off.sales<=off.target;
Use query tree to optimize the following query
SELECT Order_Num, Amount, Company, Name, City
FROM Orders, Customers, Salesreps, Offices
WHERE Cust = Cust_Num
AND Cust_Rep = Empl_Num
AND Rep_Office = Office
AND Amount = 10000
AND Region = “Eastern”
Use query tree to optimize the following query
SELECT product_id, description, cust_num, company
FROM ORDERS, CUSTOMERS, PRODUCTS
WHERE cust=cust_num
AND MFR=MFR_ID
AND Product=Product_Id
AND Amount <= 1500
