Using the attached file please write the appropriate SQL
Using the correct tables, create a sub query using either join operation you wish that will list the customer number, first and last name concatenated together, city and number of copies ordered for all customers who have placed an order for the most expensive book (based on retail price). Give the combined customer names column and alias of "Customer Name".
Using the ORDER_ITEMS table, create a query using the correct functions to return the item number, the total quantity of items ordered with an alias of "Total", the average quantity per order with an alias of "Average" (since averages are often in decimals, only show two decimal places), the minimum quantity ordered with an alias of "Minimum", and the maximum quantity ordered with an alias of "Maximum". Your output results set should have five columns and four rows of data.
Using the BOOK_ORDER table, create a query using the DECODE function that will display the OrderID, CustomerID, OrderDate and the ShipState, but spell out the name of the state (this is where the decode function comes in). Give the ShipState column an alias of "Ship State". Sort the orders by state in descending order.
Using the PUBLISHER table, create a query that will return a line of output like the one below for each record in the table. Be sure to use the correct functions in the SELECT statement, so that your output looks like the example below.
The contact person for Printing Is Us Publishing is Tommie Seymour.
Be sure to use the correct function to display the publisher name and publisher contact with only the first letter of each word capitalized.
Using the correct tables, create a query using the JOIN ON method to display a listing of all customers who have purchased more than two books. List the customer's last name, the customer's city and state, and the number of books they have purchased. Give the number purchased column and alias of "Number Purchased".
Using only the BOOK table for the upper most statement, create a sub query that will update the retail price of all books published by PRINTING IS US by five percent (retail * 1.05). Remember, all you have is the publisher "name". Use the sub query to find the publisher ID. To verify your update, provide a select statement on the BOOKS table before your update statement, and then a second select on the BOOKS table after the update. Once you have verified the results, issue a ROLLBACK statement to return the data to the original state. Note: there should be 4 statements in this step.
Using the BOOK_CUSTOMER table, write a sub query that will return the names of those customers who were referred by the same individual who referred Jorge Perez. Do not display Jorge Perez's name in the returned results (Hint: you should only have two customers displayed and the exclusion for Jorge Perez must be associated with the upper query).
Using the BOOKS table, create a query using the correct functions to return the category name, total number books per category with a column alias of "Category Total", and the total cost of all the books per category with an alias of "Cost". Format the cost column using the correct function to show dollars and cents with a dollar sign.
Using the BOOK_CUSTOMER table and the NVL function, create a query that will return a list containing the customer number, first name, last name, and the characters ‘NOT REFERRED' if the customer was not referred by another customer. Give the derived column an alias of REFERRED BY. Do not list any customers that were referred by another customer.
Using the BOOKS table and the SUBSTR function, create a query that will return a list of book ISBN codes and the book title for all the computer books. Format the ISBN code to display as 9-999-99999-9 (e.g., 1059831198 would display as 1-059-83119-8)
Using the BOOKS table, create a query using the correct functions to return the category name, the total retail of all books per category with a column alias of "Total Retail", and the average retail of all the books per category with an alias of "Average Retail" for all categories with a total retail greater than $40.00. Format the total retail and average retail columns using the correct function to show dollars and cents with a dollar sign.
Using the correct tables in your schema, create a query using either join operation you wish that will list the book title and number of authors for all books that have been written by more than one author. Give the title column an alias of "Book Title" and the column showing the number of authors an alias of "Number of Authors".
Using the BOOK_AUTHOR and AUTHOR tables for the upper most query, create a sub query that will return the BOOKID, and the first and last name of the author(s) who have written the book(s) that have been purchased the most. To successfully accomplish this, you will need to first find out the maximum total number of copies (based on quantity) sold of a book (based on bookid) in the ORDER_ITEMS table. This will be done in the bottom most query. The return from this query will be used to compare against the BOOKID in the ORDER_ITEMS table that occurs an equal number of times in the middle query. The return of this query will then be used to compare to a BOOKID related to an Author in the tables of the top most query. (HINT: Be careful, you will need both GROUP BY and HAVING clauses for your solution.)