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3.12 Write the following queries in SQL, using the university schema.
a. Create a new course “CS-001”, titled “Weekly Seminar”,with 0 credits.
b. Create a section of this course in Autumn 2009, with sec id of 1.
c. Enroll every student in the Comp. Sci. department in the above section.
d. Delete enrollments in the above section where the student’s name is Chavez.
e. Delete the course CS-001. What will happen if you run this delete statement without first deleting offerings (sections) of this course.
f. Delete all takes tuples corresponding to any section of any course with the word “database” as a part of the title; ignore case when matching the word with the title.
1. a table scan is reading every record from the table in a sequential order to find the data that a query is looking
Write an SQL CREATE TABLE statement to create the PET table without referential integrity constraint on OwnerID in PET.
A column that uses the CAST function to return the DateAdded column with its full time only (hour, minutes, seconds, and milliseconds)
use the provided appbdbcreate.sql sql script to create the database to be used when working on this assignment.question
Describe and explain Oracle Date and Time Format in details. Provide some Functions used for Date and Time and give some syntax example of their usage. Expand your examples to include some Arithmetic used with Oracle Date.
Write a PL/SQL block and declare a variable v_sal of the type NUMBER. Include the following statement in the Execution section:
Create a PL/SQL block to achieve the following using the HR schema and select the name, salary, and department of the employee with the maximum salary.
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?
Add three rows to the Downloads table: one row for user 1 and product 2; one for user 2 and product 1; and one for user 2 and product 2. Use the GETDATE function to insert the current date and time into the DownloadDate column.
Create a trigger named Products_INSERT that inserts the current date for the DateAdded column of the Products table if the value for that column is null. Test this trigger with an appropriate INSERT statement.
Create a Comparison Document
Write a PL/SQ block - Select the average salary of all employees in department number 20.
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