Write SQL codes according to the requirements given. Tables are imaginary, column names can be made up. 1. List the item ID, description, unit price, and category for each item that has a unit price greater than the unit price of every item in category CAT. Use either the ALL or ANY operator in your query. (Hint: Make sure you select the correct operator.)
2. For each item, list the item ID, description, units on hand, invoice number, and quantity ordered. All items should be included in the results. For those items that are currently not on an invoice, the invoice number and quantity ordered should be left blank. Order the results by item ID.
3. If you used ALL in question 1 repeat the exercise using ANY. If you used ANY, repeat the exercise using ALL, and then run the new command. What question does the new command answer?

Choose the best explanation for the following statement communication is symbolic

David is in week 3 of his current ashford course and has a paper due by monday night at midnight. he has finished everything but the concluding paragraph. as he boots up his computer to work on it, he sees a flash across the screen and then the screen goes black. he begins to panic as he tries desperately to turn the laptop back on. david should have saved his work on what kind of portable device?

Jason, samantha, ravi, sheila, and ankit are preparing for an upcoming marathon. each day of the week, they run a certain number of miles and write them into a notebook. at the end of the week, they would like to know the number of miles run each day, the total miles for the week, and average miles run each day. write a program to them analyze their data. your program must contain parallel arrays: an array to store the names of the runners and a two-dimensional array of five rows and seven columns to store the number of miles run by each runner each day. furthermore, your program must contain at least the following functions: a function to read and store the runners’ names and the numbers of miles run each day; a function to find the total miles run by each runner and the average number of miles run each day; and a function to output the results. (you may assume that the input data is stored in a file and each line of data is in the following form: runnername milesday1 milesday2 milesday3 milesday4 milesday5 milesday6 milesday7.)