Optimize the following SQL Query by using Query Tree and Heuristic Rules: SELECT C.Fname, E.Fname FROM Employee AS E, Customer AS C, Order AS O WHERE E.EMP_ID=O.E_ID AND C.City=’Jeddah’ AND C.Customer_ID=O.C_ID AND E.EMP_ID=’12943’ You should show the Initial Query Tree and add a screenshot of the Query Tree after applying each rule

Optimize the following SQL Query by using Query Tree and Heuristic Rules: SELECT C.Fname, E.Fname FROM Employee AS E, Customer AS C, Order AS O WHERE E.EMP_ID=O.E_ID AND C.City=’Jeddah’ AND C.Customer_ID=O.C_ID AND E.EMP_ID=’12943’ You should show the Initial Query Tree and add a screenshot of the Query Tree after applying each rule

Database Systems: Design, Implementation, & Management

12th Edition

ISBN:9781305627482

Author:Carlos Coronel, Steven Morris

Publisher:Carlos Coronel, Steven Morris

Chapter11: Database Performance Tuning And Query Optimization

Section: Chapter Questions

Problem 13RQ

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Optimize the following SQL Query by using Query Tree and Heuristic Rules: SELECT C.Fname, E.Fname FROM Employee AS E, Customer AS C, Order AS O WHERE E.EMP_ID=0.E_ID AND C.City='Jeddah' AND C.Customer_ID=0.C_ID AND E.EMP_ID='12943' You should show the Initial Query Tree and add a screenshot of the Query Tree after applying each rule. Please do not give me answer from chat gpt or any Ai , the screenshot should be from draw io for example
Draw the initial query tree for this query, then show how the query tree is optimized (one rule at a time) and write the SQL query for the final optimized query tree.
Use query-processing steps to construct the suitable query tree for each SQL statement. Show each step for query optimization. Discuss why your constructed query tree is or is NOT the optimal query tree. 1) SELECT AVG(CUSTOMER.AGR) AS "AVG_AGE" FROM CUSTOMER; 2) SELECT * FROM VEHICLE WHERE V_BRAND LIKE 'L%'; 3) SELECT MEDIAN(VEHICLE.YEAR_OF_MADE) AS "MEDIAN_YEAR" FROM VEHICLE ;
Supplier (sid, sname, city) Product (pid, pname, color) Catalog (sid, pid, price) (a): Write an SQL query for the following: Find names of products which have green color and are priced over $25. (b): Write an RA query which is equivalent to SQL query (equivalent to your answer in (a)). (c): Draw the query expression tree for your answer in (b)
Specify the initial canonical query tree that corresponds to each query. 1) SELECT AVG(CUSTOMER.AGR) AS "AVG_AGE" FROM CUSTOMER; 2) SELECT * FROM VEHICLE WHERE V_BRAND LIKE 'L%'; 3) SELECT MEDIAN(VEHICLE.YEAR_OF_MADE) AS "MEDIAN_YEAR" FROM VEHICLE ;
Write SQL query to find sum of marks of all the students in the table: Class1(RollNo, Names, Marks)
2) Write SQL query that returns the Name of ALL employees (based on EMP_LNAME and EMP_FNAME in EMPLOYEE table, call this EMP_NAME), Gender of ALL employees (based on EMP_TITLE in EMPLOYEE table, call this EMP_NAME), and Pilot ratings if any (PIL_RATINGS in PILOT table). Output: EMP_NAME EMP_GENDER Rhett VanDam M John Lange M Jeanine Duzak F
Write an SQL query to fetch the employees whose name begins with any two characters, followed by a text “hn” and ending with any sequence of characters. Write an SQL query to fetch all the EmpIds which are present in either of the tables – ‘EmployeeDetails’ and ‘EmployeeSalary’.
Implement the following ER model and sample data using Oracle SQL Developer and your CDM Oracle database account. You will submit a SQL script file and its entire outputs. The table name should be STUDENTS (plural). Each StudentID should be a five-digit number. LastName and FirstName must be entered. 12341, Doe, Jane 12342, [last name of your choice], [first name of your choice] 12343, [last name of your choice], [first name of your choice] Enrollment The table name should be ENROLLMENTS (plural). Quarters should be something like 2021Fall, 2022Winter, 2022Spring, 2022Summer1, 2022Summer2, 2022Summer10, and so forth. Grades in future quarters are entered as null. 2021Fall, 12341, IS411, A 2022Winter, 12342, IS421, null 2022Summer10, 12343, [course number of your choice], null Course The table name should be COURSES (plural). CourseNumbers should be strings of up to seven characters (e.g., IS411, DSC411, CSEC440). The course and instructor names should be strings of characters.…
Give the query graph of the following query, expressed in SQL; SELECT T_NAME, S_NAME FROM TEACHER, COURSE, STUDENT WHERE credit_hour=3 AND TEACHER.TNO= COURSE.CNO AND STUDENT.CNO = COURSE.CNO and map it into an operator tree.
Consider the SQL statement:SELECT city, amountFROM Customers INNER JOIN Orders ONCustomers.customerNumberOrders.customerNumberINNER JOIN payments ONCustomers.customerNumberPayments.customerNumberWHEREcustomer.city = "NYC" and orders.status = "Illustrate a relational algebra query tree for the execution of thestatement.
Write an SQL query that fetches the unique values of DEPARTMENT from Worker table and prints its length. ii. Write an SQL query to print the FIRST_NAME from Worker table after replacing ‘a’ with ‘A’.

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