Write a query to count the number of invoices.

ERD:- PK CHECKOUT Check Num FK1 Book_Num FK2 Pat_ID Check Out Date Check_Due Date Check_In_Date PK BOOK Book Num Book Title Book_Year Book_Cost Book_Subject FK1 Pat_ID -H- PATRON PK Pat ID Pat_FName Pat_LName Pat_Type WRITES PK,FK1 Book Num PK,FK2 Au ID AUTHOR PK AU ID Au_FName Au_LName Au_BirthYear

Write a query to list the book title, checkout date, checkout due date and checkout in date for each book.

You have been told that you need to store the zip code for employees.  Add a column to the EMPLOYEE table which will be used to store each employee’s zip code Update two rows in the EMPLOYEE table and assign a zip code (must have a WHERE clause).  (you MAY use 1 or 2 statements)  Write a query that includes each employee's last name, department name (not ID), and salary for each employee whose salary is less than the average for their department

Problem 9 Write a query to count the number of invoices.

If a subquery is used in the FROM clause of a query, how are the subquery’s results referenced in other clauses of the query?

Write a query in SQL code for: "List the book categories and the average book price of each category."  Tablename is "BOOKS" and column names are: ISBN TITLE PUBDATE PUBID COST RETAIL DISCOUNT CATEGORY

Write a query to get the maximum and minimum salary from the senators table (in that order).

Write a query to display the first name, last name, phone number, title, and department number of employees who work in department 300 or have the title “CLERK I.” Sort the output by last name and then by first name

Insert into table customerPayment, columns customerOrderld and total result set returned from query a. Select columns id and total from table customerOrder where column orderStateld is equal to subquery i. (select column id from table orderState where column state is equal to "Payment received") Write Test Case 1 as a SQL join query to do the following a. Select using concatenation of columns firstName and lastName from table www customer as Customer b. Select customerOrderId from table customerPayment as "Customer Order" c. Select description from table product as Product d. Select total from table customerOrder as “Product Total" e. Join tables customerPavment, customerOrder, customer, product f. Order by column lastName from table customer Alter table purchaseOrder add column total as data type decimal size 7,2, not null, default value of 0.0