Which relational algebra operators can be used to join a pair of tables that are not union-compatible and which are not union-compatible? Give an illustration of your point

- Write SQL statement to list the OrderID, CustName and OrderDate from Orders table using INNER JOIN with Customers table on CustID - Create a table that list the OrderID, CustID and CustName from Orders table using LEFT JOIN with Customers table on CustID.

SQL Help Write a SQL statement that add the following entry in the College table - CollegeID: 1234- CollegeName: Example College- City: San Francisco- State: CA

Explain which two indexes should be created to provide an efficient index nested loop join for the following SQL query: SELECT E.SID, O.cname FROM Enrolled E, Offering O WHERE E.OID = 0.0ID AND O.year = 2017;

How many rows does the resultant of the relational algebra expression acqcost>1500 (Tdesc,acqcost (A)) have, given the table A below? id 82943 Conference Table 77463 Conference Chair 99821 Desk 44320 Desk 99873 Conference Chair 77472 Conference Chair 88872 Speaker Phone 33411 Monitor 55" 98006 Printer 88753 Copier 72633 Chair 99098 Conference Chair desc acqcost 4998.00 247.45 1987.00 2019-09-15 1987.00 2017-11-05 247.45 2019-09-15 2019-09-15 247.45 247.00 2020-06-23 874.00 2018-03-08 1389.00 2019-12-18 4877.90 2017-12-01 642.00 2017-11-05 239.90 2020-02-10 dateacq 2019-09-15 2019-09-15

I NEED HELP WITH THIS QUESTION FOR MY DATABASE MANAGEMENT CLASS FOR SQL DEVELOPER In reporting total_sale by each REP including those who made no sale, which Table joins should be left join. And how to show zero in your report instead of null for reps with no sale.

Simplify the following query (WHERE clause), expressed in SQL, on the example database above: SELECT ENAME, PNAME FROM EMP, ASG, PROJ WHERE (DUR > 12 OR RESP = "Analyst") AND EMP.ENO = ASG.ENO AND (TITLE = "Elect. Eng." OR ASG.PNO < "P3") AND (DUR > 12 OR RESP NOT= "Analyst") AND ASG.PNO = PROJ.PNO

Customer_ID Customer_Name Order_ID Order_Date Product_Name Quantity 101 Alice 1 2023-09-01 Laptop 2 101 Alice 1 2023-09-01 Mouse 1 102 Bob 2 2023-09-02 Monitor 1 102 Bob 2 2023-09-02 Keyboard 1 103 Carol 3 2023-09-03 Laptop 1 103 Carol 3 2023-09-03 Speaker 2     For the following tables, identify the following functional dependencies where ( ? → Customer_Name).   (Customer_ID → Customer_Name ).   (Customer_ID, Order_ID → Customer_Name ).   (Customer_ID, Order_ID, Order_Date → Customer_Name ).   (Order_ID → Customer_Name ).

Consider the following expressions, which use the result of a relational algebra operation as the input to another operation. For each expression, explain in words what the expression does. a. year 2009 (takes) ▷ student b. year 2009 (takes ▷ student) C. ID.name, course_id (student takes)

All of the following are true about relational table except Each column has a distinct name Each table must have an identifier All the values in a column can be with different data types Oc. Each row represents one instance