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Write following queries in SQL and relational algebra:
1) Find the airports with a direct flight to Toronto
2) Find airports with late flights to Toronto on a big plane. "Late" means departing after 9:00pm; "big" means with capacity 150 passengers or more
3) Find cities from which one can fly to Toronto with one change of planes, and using the same type of the aircraft for both legs of the trip.
Write an SQL statement to produce a single column called ItemLocation that combines the SKU_Description,the phrase "is located in."
Run the lab_03_01.sql script in the attached file to create the SAL_HISTORY table. Display the structure of the SAL_HISTORY table.
Given the series RLC resonant circuit in the figure, operating at variable frequency, determine: The resonant frequency ω o , The circuit’s quality factor Q , The cut-off frequencies, f 1 & f 2 and the bandwidth BW
Explain how you will go about developing this database. Provide at least four queries that answer some of the questions asked by the end users.
Write down a SQL insert statement to insert new row in "CDS" table.
Write PL/SQL procedures and functions to populate and query that database
Write SQL statement which creates stored procedure with one int input parameter. The stored procedure selects the supplierId field and the total of all Count field values for each group of supplierId's from the Part table.
As DBA, your manager called a meeting and asked why there are so many orders for customers that don't exist in the customer table. Write query which would shows which customers were missing for existing orders. Use a join or a subquery.
Write SQL statement which creates the stored procedure which adds new record to the Part table, and returns value of newly created PartID PK value in out parameter.
Turn this SQL query into a relational algebra statement? SELECT Request.reqfor, Ordering.invamt, Ordering.invnbr, Ordering.invdat
Write a query to display using the employees table the EMPLOYEE_ID, FIRST_NAME, LAST_NAME and HIRE_DATE of every employee who was hired after to 1 January, 1995.
Write a PL/SQL block that displays the last name and salary of the following people. Each of these can be done separately as PL/SQL, first to test and get the output lines then encapsulated in the procedure.
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