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Turn this SQL query into a relational algebra statement?
SELECT Request.reqfor, Ordering.invamt, Ordering.invnbr, Ordering.invdat FROM Request INNER JOIN Ordering ON Request.reqnbr = Ordering.reqnbr WHERE reqfor = 'Jason Rollins';
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 down a SQL insert statement to insert new row in "CDS" table.
What is an SQL injection attack? Explain how it works, and what precautions must be taken to prevent SQL injection attacks.What are two advantages of encrypting data stored in the database?
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
Write down actors (or actress, your choice, but not both) who have won at least two (2) Academy Awards for best actor/actress. Provide the actor name, movie title & year. Order the result by actor name."
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 query to display the last name, department number, and salary of any employee whose department number and salary both match the department number and salary of any employee who earns a commission.
Create a database model and Submit the table creation statements for the Database Model.
Write PL/SQL procedures and functions to populate and query that database
Write summary query which uses CUBE operator to return LineItemSum (which is the sum of InvoiceLineItemAmount) group by Account(an alias for AccountDesciption).
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